Categories
- Living beings
- Transportation
- Space
- Vegetation
- Science
- Planet Earth
- Technology
- World
- Business/economics
- Sports
- Why is sore throat a symptom of many common sicknesses?
- Why do tablets sometimes feel like they are stuck in our throat after swallowing?
- How do chicken eggs not crack inside their body?
- How did sexual reproduction first develop in animals?
- Why are humans more energy-efficient in running than animals with four legs?
- Does the human body really have a 24 hour body clock?
- Why do our bodies ache (joints, muscles, etc.) when we are sick?
- Why is the liver one of the only organs that grows back when most of it is removed?
- Why do calories matter for losing weight but the weight of the food doesn’t?
- What are the different blood types, and why can’t we mix them?
- How does hibernation work for animals? Does a hibernating animal stay in the same position for entirety of the winter?
- Why does rain make us feel cozy?
- What makes a melody sound happy or sad?
- How do small insects not get hurt by raindrops?
- Why does gargling with salt water help with sore throat, but eating chips doesn’t?
- How complex are animal “languages”?
- What are the negative effects of drugs like Ecstasy and Molly?
- Why is it that the liver can (to an extent) regenerate but other vital internal organs cannot?
- Why are jellyfish kept in a tank without any plantation or soil at all?
- Why does alcohol leave a smell on our breath?
- Why some animals seem to enjoy human affection?
- How does the immune system work?
- Why do healing wounds feel warmer to the touch?
- Why does the body feel physically ill after experiencing emotional trauma?
- Why do pigeons thrive better inside cities than any other bird?
- What is seizure and what causes it?
- Why do we wake up with bad breath in the morning?
- Does getting 8 hours of sleep broken up throughout the day give you the same physical rest as sleeping 8 hours straight?
- What is Multiple Sclerosis, also known as MS?
- Why do we feel like throwing up when we see someone else vomit?
- Why do athletes take ice baths?
- How exactly does cancer physically kill a person?
- How do predators eat poisonous spiders and not die?
- Why do children have a seemingly innate aversion to solid vegetables?
- Why does looking at the horizon help motion sickness?
- Why do bees have stingers if using it will kill them?
- Why is it harder to stop laughing after we have laughed a lot?
- Why does throwing up hurt?
- What is the chemical that makes us feel good after doing something nice for someone?
- Why are humans more diverse as a species than other animals?
- What actually happens when you “pull” a muscle?
- Why do humans like music? Does music serve an evolutionary purpose?
- What does “cracking your back” do, and why does it feel good?
- Why do only females of the species raise offspring?
- What is nervous laughter and where does it come from?
- Why do we have to keep our teeth clean whereas other animals do not?
- Why can’t babies drink water until they are six months old?
- Why are humans still allergic to pollen? Why has evolution not made us immune to it?
- Why don’t fireflies get hot when they glow? Why can’t we make anything as efficient?
- How do flies constantly fly into hard objects at high speeds yet don’t get hurt?
- Why is our brain programmed to like sugar, salt and fat if it’s bad for our health?
- Why is urine frothy sometimes?
- Why is it fine to inhale water vapor but bad to get liquid water into your lungs?
- Does body receive the effects of sleep when in a coma?
- After eating a stomach-full how can we eat again after a while without having apoopny bowel movements?
- Why does a woman’s immune system attack and kill sperm cells?
- Why do we get an urge to pee when we are nervous before a big event?
- Why do we sweat while asleep if are supposed to be inactive?
- Why does spicy food make your nose run?
- Why does standing in one place make legs more sore than walking?
- What is the connection between insulin and body fat?
- What are the causes of and remedies for pot belly?
- How do mosquitoes find people in dark?
- Why do mosquitoes bite some people more than others?
- What is Middle Child Syndrome?
- Why do some people have dimples?
- What is the origin of the phrase “beer belly”? Does beer really cause pot belly?
- How is the mating ritual of octopus?
- Is it true that humans have more than five senses?
- Is it true that dragonflies can fly up to 60 mph?
- Does a person stay conscious after decapitation?
- How silk is made from cocoon?
- How is iron useful for the body? Which foods contain the most iron?
- How does sugar make you fat if there is no fat in it?
- Why does the stomach growl when we are hungry?
- How do fish’s gills work? And why do fish die when taken out of water?
- What are the causes and treatment for dark circles under eyes?
- Why are bats believed to be blind?
- What is the connection between testosterone and hair growth?
- How does eating carrots change your skin color?
- How does body generate and use electricity?
- Why vultures don’t get sick from eating rotten meat?
- Can snakes swim? If yes, how do they swim?
- Is it true that we only breathe through one nostril at a time?
- Do moths really eat clothes?
- How bad is lead in food? How does it get into foods like Maggi noodles?
- What are the causes and treatment for chickenpox?
- Why is chocolate poisonous to dogs?
- What purpose does pubic and armpit hair serve?
- Why can’t a person tickle himself?
- Who is considered to be the mother of all humans living today?
- In what language do deaf people think?
- What makes your arms, legs and feet fall asleep?
- What are the best ways to keep mosquito bites from itching?
- Why does hair stop growing after reaching certain length?
- What are eye floaters? What causes them?
- Is it true that Candiru fish can swim upstream into your urethra?
- Why is poop brown? What does it mean if the poop is green, black or red in color?
- Why does scratching an itch make it worse?
- Why do armpits smell bad?
- What are Viruses? How do they infect organisms?
- What is viral fever?
- What is hibernation? And how is it different from aestivation?
- How long can a person go without sleep?
- Why is it necessary to sleep every night?
- Is it true that pupils dilate when we see something we like?
- What are the causes and treatments of pimples or acne?
- Why do eyes close when sneezing?
- Why do dogs run behind cars and bikes?
- Is it true that only female mosquito bites? What does male mosquito feed on?
- How fast can a cheetah run? Can runners like Usain Bolt and David Rudisha beat cheetah on a racetrack?
- Why do frogs go into hibernation in winter?
- How do cats see in the dark?
- How do dolphins sleep without drowning? Is it true that they sleep with one eye open?
- Why are some animals and birds albino (without color)? And why albinos are few in number?
- Relative to its body size which bird lays the largest egg?
- If the venomous snake bites itself would it die?
- How do hummingbirds manage to hover in mid-air?
- What makes us thirsty? Is it dry mouth or dehydrated body tissue that signals thirst?
- Why do some birds migrate thousands of miles?
- On what basis is blood classified into various groups?
- Since evolution still continues, will man grow bigger head in the future?
- Is hummingbird the smallest bird? How small is it?
- Can any animal live for years without food?
- Why do we speak louder than normal when wearing headphones?
- Why can’t we see in the dark like cats and owls?
- How was blood circulation proved by William Harvey?
- Can insects like fly hear?
- How do honeybees help plants?
- Which is the heaviest organ in human body?
- What causes some people to faint all of a sudden?
- Why does laughter bring tears to the eyes?
- Is there any bird which is poisonous?
- Why does a honey bee die after it stings a human being or an animal?
- Why can’t we remember what happened to us when we were babies?
- How many flowers a honeybee must visit to make 1 kilogram of honey?
- Where did New Zealand’s birds and animal like kiwi, kea, kakapo, possums, sheep, etc come from?
- How does bat manage to fly in the dark night?
- What is the world’s largest vulture? And where is it seen?
- Why does a cat dropped from a height always land on its feet?
- Can a housefly see in all the directions at a time?
- How many red cells are there in human blood? How are they counted?
- Why do the snakes living in deserts move sideways?
- Some camels have two humps on their back. What are they called?
- Why do cat’s eyes shine in the darkness of night?
- Why some birds like Ostrich, Kiwi and Penguins are flightless?
- Which are the longest sleeping animals, after sloth?
- Why and how do spiders spin threads?
- Do parrots know what they are talking about?
- Why deer have antlers? What are they made of?
- What is tetanus? What causes it?
- Why does sore throat look red?
- How does cockroach easily avoid a swipe? Which organ forewarns it about the attack?
- Why do we swing our arms back and forth while walking?
- Why our height increases a little during night’s sleep?
- Is there a color that human eyes can not see?
- Why do dogs sometimes breathe with their mouth open and tongue lolling out?
- Why do we lose the sense of smell when we have a cold?
- What is the function of the outer ear or pinna?
- Why can’t we remember certain dreams?
- Do our brains work while we are asleep?
- Do bees really hum as they fly? If yes then why?
- Where do seashells come from?
- Which is the largest insect in the world and where is it found?
- Which bird lays the largest egg?
- Why were prehistoric dinosaurs so gigantic? What was the advantage of their large size?
- Why does the tongue burn after eating chili? What is the quick remedy for it?
- How long can a whale stay under water?
- How does a snake swallow something bigger than itself?
- What does a virus look like? How does it function?
- What causes an intensely painful and persistent toothache? And what is the remedy?
- Which is the fastest moving land snake in the world?
- Why does mosquito bite itch? How to prevent mosquitoes from biting?
- How can some insects like housefly walk upside down on the ceiling?
- What is sponge? Is it an animal or a plant?
- Why does one’s face turn pale white when one is frightened?
- Why do we have lines on the palms of our hands?
- How do insects infect us through their sting or bite?
- How the human body makes blood?
- Why do we feel thirsty after consuming salt?
- How much oxygen a person consumes in a minute?
- Which is the most venomous (poisonous) snake in the world?
- Why birds perched on high voltage electric wires don’t get electrocuted?
- How big is the largest dinosaur egg found so far?
- Which is the most dangerous creature in the world?
- Why hair color becomes white as we get older?
- What is the reason for somnambulism (sleepwalking)?
- Why does a rooster crow loudly at daybreak?
- Why birds don’t fall down from a tree branch during sleep?
- How do police dogs sniff out hidden explosives?
- How do camels store water in their hump? And how long can it survive without water?
- Why ice-cream sometimes causes a headache?
- Why does a dog go round and round before it lies down?
- Do white elephants really exist? Where can they be found?
- Why do ants touch each other with their heads when they meet? Why do they walk in a file one behind another?
- How does a chameleon change color to blend with its surroundings as a protective measure?
- Why do we feel dizzy after running in circles?
- Is overdose of vitamins harmful or the body just flushes out the excess substance?
- Why do we rub our eyes when we are tired?
- What causes hiccups and how they can be cured?
- Why do we have two – deciduous and permanent – sets of teeth?
- Is it true that drinking a glass of warm milk before going to bed induces sleep?
- Why do eyes burn when cutting onions? How to prevent it?
- What is the reason for acidity and burning sensation in the chest after eating spicy food?
- What is the scientific cause of headache and migraine? What actually happens in the head at that time?
- Why does tail of a house-lizard (gecko) jerk and toss about for some time even after detaching from the body?
- What’s the reason for and benefits of fever and body temperature rise?
- Is Chihuahua the smallest breed of dog?
- Why the flock of migrating birds mostly flies in ‘V’ formation only?
- Why do we yawn? Is it infectious? And why do the ears appear to have become deaf during a yawn?
- Do Hippopotamuses have pink colored sweat? What is the reason for it?
- How does a sloth survive in the wild where norm is survival of the fittest?
- What is the difference between tortoise and turtle?
- Why do we have wisdom teeth? Why are they sometimes painful?
- Why do snakes have forked tongue?
- What are fingernails made of? Why do they appear pink?
- Do fish drink water? What is Osmosis and Diffusion?
- If you can see something with one eye closed then when seen with both eyes why doesn’t it appear double?
- How did Swine Influenza Virus (SIV) originate? And how did it get the name H1N1?
- Why does persistent yelling make one hoarse?
- How long is the life of passenger planes like Boeing-747 (Jumbo Jet) and Airbus?
- Why do air travelers experience jet lag after a long-haul flight? And how to prevent or remedy it?
- How does petrol-electric hybrid car that uses regenerative braking work?
- How fast can a helicopter fly?
- Which is the longest non-stop flight ever made by a commercial airliner?
- What happens if an aircraft flying in stormy weather is struck by lighting?
- How much petrol the fuel tank of an airplane carries?
- Why in traffic signals red light is always placed on the top but in railway signals it is placed below green light?
- Which is the world’s most successful passenger aircraft so far?
- Why the entire surface of the passenger planes is not painted over? Why the nose of the plane is black?
- What are the features of the world’s cheapest car, Tata Nano?
- How can space or the universe be both infinite and expanding at the same time?
- Why can’t you look directly at an eclipse?
- Why is smiling forbidden in passport photos?
- How was the Moon formed?
- How long can a person survive in the vacuum of space?
- Who named our galaxy the Milky Way? And why it is named so?
- Why do we only see one side of the moon?
- Is our Milky Way a static object or rotates like planets and stars?
- Has any spacecraft ever been hit by space debris in orbit around the Earth?
- Why is the sky dark if there are billions of stars in the Universe?
- How do scientists know that dark energy is speeding up the expansion of the universe?
- What would happen if Earth passed through a comet’s tail?
- What is ‘Grandfather Paradox’ concerning time travel and how can it be resolved?
- Which is the most dangerous stage of a manned spaceflight?
- What are gravitational waves? Do they really exist?
- What is the chemical composition of the Sun? How do astronomers identify the types of elements it contains?
- Why is Jupiter’s moon Europa believed to have life under its surface?
- What type of physiological problems the astronauts undergo after spending a long period in the weightless condition?
- What is the source of the Sun’s energy output?
- What kind of atmosphere does Mars have?
- Why do stars have different colors?
- What did the American astronauts leave behind on the Moon?
- How will the Universe end? Or will it go on expanding forever?
- Is there a supermassive black hole at the center of our Milky Way galaxy?
- Why has Pluto been demoted being classified as dwarf planet?
- What happens when two galaxies collide in the universe?
- What is a Quasar?
- What is antimatter? Are there stars and planets made of antimatter?
- Which has been the longest manned spaceflight so far? How long can astronauts stay in weightlessness?
- How will our universe end? Have astronomers made any prediction about its ultimate fate?
- How many stars are there in Our Galaxy – The Milky Way?
- How do astronomers detect black holes if they cannot be observed with any kind of instrument?
- Is there any possibility of undertaking the first manned space flight to Mars, the red planet?
- What did Galileo Galilei see when he turned the first telescope to the Sun?
- Could Jupiter ever become a star? If it did, how would it affect the solar system?
- Why is the Moon sometimes visible during the day?
- What kind of a star is called White Dwarf?
- What is a shooting star? Do stars really fall down from the sky?
- When our Sun becomes a black hole, would it gobble up the Earth?
- Why there are more stars in the sky some nights than the others?
- Why is it not possible to see a black hole?
- When was the existence of black holes predicted for the first time? And by whom?
- How did our Milky Way Galaxy originate? What led to the formation of such a huge entity?
- Will the Earth become a black hole one day?
- What is the difference between a meteor and a comet?
- Why stars flicker whereas planets shine steadily?
- Did Neil Armstrong really go to the Moon or NASA had faked the Moon landings?
- What temperature is faced by astronauts and satellites in the space?
- What is the exact number of stars? What method is used by the astronomers to count them?
- What do black holes in the universe look like?
- Why are astronauts weightless in the space? Is it because they are beyond the pull of gravity?
- Do other planets experience total solar eclipse like the one we witnessed on July 22, 2009?
- How does the Sun convert its mass into energy according to Einstein’s famous equation E=mc²?
- Which is the highest mountain in the Solar System? Is it Mount Everest?
- Which force keeps satellites circling Earth?
- What is the length of day and night on the moon?
- Where had the Big Bang happened? Where is the center of the universe?
- Why are fungi considered neither plant nor animal?
- What determines if a plant is a fruit or a vegetable?
- What part of marijuana causes the high? And how did humans discover it?
- Why are fruits sweet and vegetables not sweet?
- How do trees which don’t produce fruit disperse their seeds?
- What is the difference between fruits and vegetables?
- Why are unripe fruits green and bitter while ripe fruits are colorful and sweet?
- How does Strangler Fig squeeze its host tree to death?
- Why does fruit ripen? What causes the ripening process?
- Where did onions originate from? And how did they become popular around the world?
- Why pulses and beans contain protein and vegetables don’t?
- From where does the sweet water come inside coconut? What is its role?
- What is the raw material of menthol?
- What is miracle fruit that turns sour food sweet?
- How can a Peepal tree grow on a bare wall which apparently lacks nutrients?
- How does groundwater reach up to the top of the tall trees like coconut palm?
- Why don’t trees suffocate during autumn for they carry out respiration through leaves?
- Are there any plants without flowers, fruits, seeds or even roots?
- Where does the flavoring agent vanilla come from? Is it sourced from plants?
- Which is the least nutritious fruit?
- Which tree gives the lightest wood in the world? And which one is made of the heaviest?
- Which is the most nutritious fruit among those commonly eaten raw?
- Why different flowers have different colors?
- When, how, and where was the world’s first coffee discovered?
- What are the different types of carnivorous plants?
- Why are some plants insectivorous, or carnivorous?
- Why do trees stop growing after reaching a certain height?
- Which are the tallest plants and trees in the world?
- Why does sunflower always face towards the Sun?
- Why the skin of a banana turns black in refrigerator?
- What substance is the white powdery coating on grapes?
- Why does a laser pointer have a grainy pattern in the beam?
- What would happen if air bubbles from a syringe are not removed?
- What is a magnetic field flip?
- Does a bullet shot into the air come down with a force strong enough to kill?
- If light slows down passing through water, how does it speed back up when it comes out?
- What are scientists doing to combat drug-resistant bacteria and superbugs?
- What would happen when water is put into an unbreakable container and then frozen?
- If photons (particles of light) have zero mass, how can they exist?
- How do scientists know that a rock is from space and not of earthly origin?
- How can a piece of paper folded 103 times be larger than the observable universe?
- Why is CO2 added to carbonated water/soda and not other gasses? Why not add just air?
- Why are canned foods high in sodium? Doesn’t canning eliminate the need for preservatives?
- What is the difference between ketchup and tomato sauce?
- How does deodorant work, and why it stops working after a few hours?
- What is the difference between different types of toothpaste?
- How does Einstein’s Theory of Relativity work?
- What does it take to convert matter into energy, and would it cause an explosion?
- Why does rain fall in a constant downfall instead of one giant burst dropping the water?
- Why do voices sound high pitched when sped up?
- Why does nail polish stay liquid in the bottle but quickly dries once applied to nails?
- How did E = mc² become a famous equation?
- Why do electronic devices which have gotten wet, stop working even when they are completely dry?
- Why is it safe to eat veggies/fruits grown in rain/waste water, but not safe to drink the water by itself?
- Why are things shiny (or shinier) when wet?
- What happens to the water content of an egg that has been hard-boiled?
- How does diet soda have 0 calories?
- What are numbers and why do they do such a good job of explaining the universe?
- If human civilization ended tomorrow, how long would it take for all evidence of our existence to disappear?
- What was considered junk food in ancient times?
- Why do small objects stick to our fingers when we push down on them?
- Does movement of electrons in an atom consume energy?
- Does the air turn into water at 100% humidity?
- How do we know that fusion reaction takes place on the Sun?
- Is there a limit to how many new chemical elements we could discover/create?
- Can an explosion push a person away without harming them like they show in the movies?
- How can lightning strikes cut trees in half?
- Why does swallowing an air bubble hurt?
- Why is 0 factorial = 1? If n = 0, shouldn’t the answer be 0 as anything multiplied by 0 = 0?
- Why does glue not dry up in a bottle?
- Does the air turn into water at 100% humidity?
- Why oil and water don’t mix?
- Why nuclear explosions create mushroom clouds?
- Why is uterus removed? How is it done?
- What is baking soda? What are its health benefits?
- Why is smiling forbidden in passport photos?
- What keeps fire hydrants from freezing in winter?
- Why is it not safe to put metal vessel in microwave oven?
- How are diamonds made out of coal?
- How do night vision goggles work?
- What is the difference between concrete and cement?
- How does breathing into a paper bag help hyperventilation?
- How is maximum occupancy of a building is calculated?
- Why doesn’t honey go bad?
- Why do we fart after eating beans?
- What is Ajinomoto? Why is it considered harmful?
- Why are some potato chips green? Are they poisonous?
- What is DNA fingerprinting?
- Is nose-picking healthy?
- How do solar panels work?
- Why do doctors feel your testicles and ask you to cough in a physical?
- What are the different types of calories?
- Does drinking Mountain Dew lower sperm count?
- Who invented the Periodic Table? What is its history?
- What exactly is lightning? And how does it occur?
- What is the history behind the invention of hypodermic syringe?
- What are stem cells? What are their uses?
- In what atmospheric conditions is dew formed?
- What is the formula to calculate IQ? Is IQ of 100 good?
- How does polygraph test work? Is it accurate in detecting lies?
- Why are drops of liquid always spherical in shape?
- What are the true primary colors, if not red, yellow and blue?
- How do induction cooktops work? Are they cheaper than gas?
- Who is the inventor of band-aid that is used to cover wounds?
- Why is diamond so hard even though it is basically graphite?
- What is horsepower? Why is it calculated on the basis of horse’s physical strength?
- How much energy is produced by collision of matter and antimatter?
- What is the fastest speed a spacecraft can achieve?
- How do cracks appear in mud flats during the period of drought?
- How do scientists calculate the number of calories in a particular food and the number of calories in a particular exercise?
- How does a fuel-air bomb? How does it differ from a conventional bomb?
- Why do we hear sound father away at night better than during the day?
- How is scent extracted from flowers like roses?
- Why does water bead up on the surface of a wax-polished car?
- Did medieval alchemists have magical powers to form gold out of cheaper metals?
- Why do radioactive materials like plutonium in nuclear waste continue to pose threat for many thousands of years?
- What is the difference between cluster bomb and conventional bomb?
- Will a car give more power and deliver more kilometers per litre with premium fuel?
- What are the two different types of calorie?
- Is it true that during warm weather it is a bad idea to fill car’s petrol tank at the end of the day?
- Why does a slice of bread with liberal application of honey on one side bend like a concave lens?
- How does an artificial heart work? Who was the first recipient?
- Why are dark things warmer than light colored or simply white things?
- How are bombs made out of chemical fertilizers?
- How do botanists know the exact age of a tree?
- Why do we see the flash from a gun before we hear noise?
- What are Polarized sunglasses? How do they work?
- How do sound waves travel through air? Why do they move faster in water than in air?
- Why an automobile’s windscreen glass shatters into rounded pieces when it breaks?
- Why the capacity of air conditioners is expressed in tons instead of horsepowers?
- Why a multistage rocket is needed to get a spacecraft off the Earth and into the space?
- How does a combination lock work? Why is it considered more secure than the cylinder lock?
- Can hydrogen become an alternative fuel to petrol and diesel?
- Why is gold so easily malleable while iron is so rigid?
- How much helium is required for buoyancy if a person wants to go up in the air on a balloon?
- On milling maize (corn) we get maize flour then how is corn oil derived?
- If one walks inside a train in the same direction the train is moving, does one move faster than the train?
- What is the process of food irradiation? And how does it prevent food spoilage?
- What is pig iron? How did it get this name?
- What is bionic technology or bionics?
- Whose idea was it to produce electricity from nuclear energy?
- Why sand is attracted to magnet even though it is not a metal?
- What is anemometer? How does it work?
- How many electrons are there in electric current?
- How much CO2 does a passenger car emit per kilometer traveled?
- At what speed light travels? How do scientists measure the exact speed?
- Why is the cooling power of air-conditioner measured in tons?
- What creates ripples like undulating patterns of sand in the desert?
- Why do we hear the sound of sea waves a conch shell?
- What is time dilation? Is it possible for an astronaut to travel 2,000 light years in a lifetime?
- How do neon and fluorescent lights work?
- What is Centrifugal Force? Is it of any use to us?
- Why when the train races forward its smoke goes backwards?
- What function does barcode perform? And where is it used?
- Is telepathy fact or fallacy? Can thoughts really be transferred through extrasensory means?
- How is cold generated in a refrigerator? Why is icebox positioned on top in a fridge?
- How does soft water differ from hard water?
- Why are the windows in airplane passenger cabins oval?
- Does every planet have a law of gravitation?
- Does light get fainter as it travels?
- How does glue work? How does it bond two things?
- Is there any specific difference between mass and weight?
- Why does blotting paper absorb ink?
- Why do factories have tall chimneys?
- How does soap take the dirt out of things?
- Why do dark objects look smaller than bright objects?
- Why does milk turn sour? What gives it sour taste?
- Why is foam of soap always white even if the soap is of different color?
- Why does a candle flame defy gravity and burn upward? What will happen on lighting a candle in space?
- How fast does a free falling object fall?
- Why does hot water freeze faster than cold water?
- How does meteorological department study the higher atmosphere for making weather forecast?
- What is the secret behind strength and durability of the Great Pyramid of Khufu?
- Why some diseases are infectious while others re not?
- Why does yeast make bread rise and bubble?
- How does India-rubber and ink-eraser erase pencil and ink marks?
- Do things weigh heavier or lighter when hot or cold?
- Why walking on ice is difficult? Why is ice slippery?
- What is chloroform? Why does it send the person to sleep?
- Why does heat make paper curl up?
- How is Einstein’s theory of relativity responsible for the color of gold?
- Why does iron sink in water but floats on mercury?
- What does the word ‘Cola’ mean in Coca-Cola and Pepsi-Cola etc.?
- Why does water gurgle when it’s flowing out from a bottle?
- How does blood pressure measuring apparatus (sphygmomanometer) work?
- How can doctors tell our temperature by feeling our pulse?
- Why does water always seem shallower than it is?
- Which is the softest mineral that has been given the lowest rating of 1 on Mohs scale of mineral hardness?
- Why do Formula One racing cars make so much noise?
- What is the size of an atom? Can we see it?
- How does the pain killer Aspirin work inside the body?
- Does sound travel at the same speed in air and water? Does it go on forever?
- Why is it easier to swim in saltwater than in fresh?
- Why vaccination prevents us from having smallpox?
- Who invented stethoscope? How does it work?
- How to find right direction without a compass?
- How is colorfully striped toothpaste manufactured?
- Why hot water appears milky white when drawn from the faucet?
- What are sound waves made of?
- Why does a popcorn kernel “pop” when it is roasted?
- Why photochromic glasses turn dark when exposed to sunlight?
- What is the unit of carat which is used for measuring the weight of diamonds?
- What’s the reason for keeping a hole in the center of a parachute?
- How is ‘expiry date’ of medicines determined?
- What shape do raindrops have? Are they tear-shaped like normal droplets of water?
- Does iron increase in weight when it rusts?
- What technique is used in microwave ovens to cook food in minutes?
- What is thermocol? And what is its manufacturing precess?
- Why are X-rays named after a letter of alphabet? What makes the X-rays pass through solid objects?
- Are bullets fired into the air lethal?
- Why is steam hotter than the boiling water?
- Why sugar dissolves faster in hot water than in cold water?
- Why does food cook quicker in a pressure cooker?
- Why is water used as a fire extinguisher?
- What are the units of measurement of light?
- What is the process of turning Mercury into Gold?
- Which material is used for making capsules of medicine?
- When was the mathematical symbol p (pi) discovered? And what are its peculiarities?
- How do bakers make a small lump of dough swell up and turn it into spongy bread?
- Why does a boomerang return to its thrower? What’s the science behind it?
- Why ships and airplanes measure speed in nautical miles (knots) rather than miles and kilometers?
- How do we know what materials the interior of the Earth is made of if the farthest we have dug is 8 miles?
- How do deserts form? Where are those sands coming from?
- How did the oceans get polluted with mercury?
- How do scientists find out the temperature of the earth thousands of years ago?
- How are oases formed in deserts?
- When and how were the Himalayas formed?
- Why are hill stations cooler than plains?
- What is the difference between Natural Greenhouse Effect and Enhanced Greenhouse Effect?
- What is Geothermal Energy? What is its source?
- What are the principal layers of the atmosphere of Earth?
- Why does the ocean appear blue? Is it because of the sky’s reflection?
- Why is the center of the Earth still hot?
- Have the oceans always been salty?
- Which countries are geographically spread over two continents?
- How is noise pollution killing whales?
- Which has been the highest officially recorded sea wave?
- Which is the wettest place in the world? Cherrapunji, Mawsynram, or Waialeale?
- Why don’t we feel the motion of the rotating Earth?
- How did scientists determine that the Earth bulges at the equator?
- Why do we experience rich and refreshing earthy smell after a rainfall?
- Is Mount Mauna Kea of USA taller than the Mount Everest?
- What is a hurricane? How is it different from a typhoon?
- Which is the remotest inhabited island? How far is it from the nearest human habitation?
- How many oceans are there on the Earth?
- How high up do the highest clouds float?
- What is pumice stone?
- Like the Moon, does the Sun play any role in causing ocean tides?
- What caused the earthquake and the tsunami in Japan on March 11, 2011?
- Where is the next tsunami expected to strike? Western USA!
- Which direction the needle of a compass will point to if the compass is on the North Pole?
- How did South Africa come to be so well endowed with minerals?
- How much does the Earth’s atmosphere weigh and what amount of pressure does it exert on our body?
- Is there more moonlight in winter than summer?
- Why is there a runaway greenhouse effect on planet Venus?
- Why Yellow Sea, Black Sea and Red Sea have been assigned such peculiar names?
- What are the chances of a person getting killed by meteorite strike?
- It is true that millions of years ago there was an ocean in the area now occupied by the Himalayan mountain range?
- Which are the biggest waterfalls in the world, apart from Niagara Falls?
- Why the salt in Dead Sea keeps increasing even though it continuously keeps adding fresh water from the river?
- What is the peculiarity of the natural wonder Angel Falls?
- Who was the first to estimate the weight of the Earth?
- How much is the Earth flattened at the Poles?
- Is Maldives going to submerge in the ocean due to rising sea-levels? How much time it has?
- Should we see the Earth go round if we stood still in a balloon in the sky?
- What is responsible for the extinction of dinosaurs, asteroid impact or volcanic eruptions?
- What is smoke made of?
- Which acids are contained in the acid rain?
- What is the Earth made of? What is beneath the Earth?
- Why is the sky dull when a storm is coming on?
- Why does a river curve and twist instead of running straight?
- How was it proven that the Earth is round and not flat?
- Why is rainbow shaped semi-circle? What is the reason for it being colorful?
- What is the weight of the planet Earth? Is it constant or increasing?
- Why does a person weigh different at different places on our planet?
- Why the composition of atmosphere is so specific and steady with 21% oxygen and 78% nitrogen?
- Why aren’t people at the equator thrown off into space by centrifugal force since the Earth is rotating at a high speed?
- Why do clouds float in the sky even though they have tons of water in them?
- What is the quantity of gold in the seawater? Is it possible to reap it?
- Is there any physical evidence that asteroids struck our planet in the past?
- What is the number of active volcanoes in the world?
- To what extent the sea level would rise if all he icecaps in the world melt due to Greenhouse Effect and the global warming?
- Out of the 24, which time zone applies to Antarctica where all time zones meet?
- Why do many workplace PCs still run on old software?
- How are hexadecimal color codes formed?
- Why do lithium-ion batteries lose their ability to maintain charge after many cycles of charging?
- How can any storage device keep information once unplugged from the computer/power?
- Why do lines appear in the picture when we photograph a computer screen?
- What happens to an email once it is deleted?
- How does a computer unset a bit (set it from 1 to 0) in memory/storage?
- How do motion detectors detect motion in the dark?
- How is it possible for ISP’s to know we are doing online? Isn’t HTTPS supposed encrypt content so it can’t be read?
- What is the difference between noise isolating and noise cancelling headphones?
- How do baggage scanners at the airport work? What do the different colors on the x-ray mean?
- Why are screen resolutions like 1920×1080 rather than 2000×1000?
- How does a database handle huge amounts of data that can be retrieved within a second?
- How does clearing browser cache/cookies fix a lot of website issues?
- Why are phone companies like Apple removing headphone jack?
- Why do we need IP address to be connected to internet when we have MAC address already?
- How do Facebook ads know what we searched on Goggle?
- How do people who end up in viral videos and/or memes suddenly become rich? Where does the money come from?
- Why can’t GIFs be compressed in the same way videos can?
- How do emails detect and send spam to the junk folder but allow some emails come through to the inbox?
- Why do software engineers use error codes to describe issues instead of saying what is wrong?
- What is the difference between JPG and PNG image formats?
- How did old games like Super Mario fit into just tens of kilobytes?
- Why is HTML not considered programming?
- How can cable TV service work nearly 100% of the time while internet service is inconsistent?
- What is 3D printing?
- Who designed Analytical Engine, the first programmable computer?
- How fast can a supercomputer work at the very most? Is there a theoretical limit on the speed of its operations?
- Why is a problem in a computer program called a bug?
- Where does a text SMS go if the receiver’s phone is switched-off?
- How millions of transistors switch on and off to register the digital 1 and 0 in the microchip?
- Which was the world’s first communication satellite?
- What happens if a car having petrol engine is refueled with diesel?
- Who invented the first personal computer and when?
- How does an ejection seat work in a fighter aircraft?
- Who owns the Internet? Is it the US Government?
- Where is all the information data on the Internet stored?
- How long did the first light bulb stay lit?
- Who invented Intel’s first Pentium chip?
- What is RSS feed and RSS aggregator?
- What is email spam? Where is the word ‘spam’ derived from?
- Who invented the word cyberspace? What does it mean?
- What is the technique of Earthing used in a three-pin electric plug?
- How do machines mimic human speech?
- How does compact disc (CD) work?
- What is meant by a zero watt bulb?
- How does a mobile phone work? And is it harmful for the brain?
- Since the Coca Cola recipe is a secret, isn’t it illegal to not list all the ingredients for a product?
- What are noir and neo-noir genres of movies?
- Why do some cops in big cities like New York still use horses?
- When did “Hands up!” become “Hands behind your head!”?
- Why doesn’t the United States have a high speed rail system?
- Why do Asian countries have a much smaller rate of obesity than the US?
- Why is handwriting from the past so much prettier than writing now?
- Why Americans use drywall instead of concrete and bricks to build houses in areas prone to natural disasters?
- Why are coins historically round and not square?
- What is the difference between an Empire, Kingdom, Duchy and Republic?
- Why do Americans celebrate Columbus Day despite Columbus never setting foot in their country?
- Why do Asian tourists in the West wear medical face masks?
- Why is pizza the most popular delivery food?
- What is the correct use of semicolon?
- How did the word “gross” end up with so many different meanings?
- Where did the social expectation of only girls wearing dresses come from?
- Why are video game final enemies always called ‘the boss’?
- Why do most societies have two-name system?
- What is the history of loafer shoes? What are the different types?
- Which is the biggest school in the world?
- What was the Cold War? And why is it called Cold War?
- Who invented bubble wrap? And what is the story behind it?
- How did America get its name?
- Why do Jews write G-D instead of God?
- What is the origin of the word “buck” for dollar?
- What does SOS stand for? When was the first SOS message relayed and by whom?
- When and where did slavery start?
- Where there ever Black slave owners?
- When and why did women start shaving their body hair?
- Who invented chocolate chip cookies? What is the story behind it?
- When and where was fork invented?
- Why do we toast drinks to celebrate?
- Why are black cats considered bad luck?
- How did Africa get its name?
- What is Root Beer? What is its history?
- What does the word Amen mean? What is its origin?
- Why sneakers are called sneakers?
- What is meant by Third World Country?
- Who is the world’s oldest woman to give birth? At what age?
- Who invented French fries? What is its history?
- Why do men’s bicycles have crossbars while women’s bicycles don’t?
- Who invented the original selfie stick? What is the story behind it?
- Why do Japanese write from top to bottom?
- What is the difference between the UK, England, and Great Britain?
- Why is jaywalking called jaywalking?
- What is the origin and history of the 21-gun salute?
- Who Invented peanut butter? What is its history?
- Why don’t Amish men grow mustaches?
- Which is the largest religious monument in the world?
- Is prostitution really the oldest profession in the world?
- Why is a Baker’s Dozen 13 instead of 12?
- What is the Non-Aligned Movement? In what context was it formed?
- Who was the first person to circumnavigate the world? Was he alone?
- What is the difference between United Nations and League of Nations?
- Who painted the picture Guernica? Which tragedy inspired it?
- Which literary work is considered to be the first novel in the world?
- When did the Earth Day start to be observed? Which incident inspired the creation of Earth Day?
- What was the Boston Tea Party?
- What is the story behind the formation of WWF?
- What is Magna Carta? What is its importance in history?
- What is an Ophthalmoscope? Who invented it?
- Where did the Cultural Revolution take place?
- What was Velvet Revolution? Where did it take place?
- Which award is known as the Nobel Prize of Asia?
- Who is known as the father of typewriter?
- Who invented the Polaroid Camera and Glare-free Car light?
- Who was the inventor of fax machine? Who established the first commercial fax service?
- What is a Swiss Army knife? Who invented it?
- Who invented the Dishwasher?
- What is the story behind the origin of Coca-Cola?
- Which is the most valuable object relative to its weight and size?
- What is the origin of the word ‘robot’? And what were the first robots?
- What is the story behind Sony Walkman invention?
- What was the idea behind the invention of pagers?
- Who is the inventor of fountain pen?
- Which is the greatest invention that has changed our lives in a big way?
- Who reported seeing UFO for the first time?
- Which is the most unusual language in the world?
- Why did Columbus sail west instead of east if he wanted to reach India?
- Who invented solar cells to harness the Sun’s energy?
- How did Adolf Hitler spend his last few days before committing suicide?
- Which was the first country to introduce paper currency?
- Which are the top ten countries with petroleum reserves?
- Has any of Nostradamus’s predictions actually come true?
- Which is the port and which the starboard side of ship?
- Which countries have been under foreign rule for more than a century?
- Which has been the longest and heaviest freight train on record?
- Who invented torpedo and how does it work as an anti-ship and anti-submarine weapon?
- Why ten basic numerals are called Arabic numerals even though their script is not Arabic?
- Will the world really end on December 12, 2012? Or it is just a hoax?
- When were elephants first used in war and how far were they effective?
- When and where were playing cards invented?
- When was the ship’s distress signal SOS/Save Our Souls used for the first time?
- What is the D-day and what does it mean?
- Who had burned down the original White House building in 1814? And why?
- Which country is the world’s largest producer of bananas?
- What was the first logo of the camera brand Canon? Why it failed?
- How were the early mechanical clocks?
- How much is an Oscar Award statuette worth?
- Who invented seismograph for detection of earthquake and measurement of its intensity?
- Who invented the World Wide Web? When was it?
- When was computer giant Microsoft Corporation established?
- Which was the most damaging earthquake in recent history?
- Who invented the Pneumatic tire?
- Why is number 13 considered unlucky?
- How did Greenwich become the center of the world time?
- How many times did Christopher Columbus visit North America?
- Which was the world’s first newspaper? When did it begin?
- Why do some countries drive vehicles on the left-hand side of the road while others on right-hand side?
- Which country was the first to start selling bottled mineral water?
- Who was Uncle Sam? Why the United States of America is called that?
- Does the abominable snowman (Yeti) really exist in the Himalayas?
- Why Mediterranean Sea is named so?
- How many workers were employed for construction of the Great Pyramid of Khufu?
- How many patents are granted for perpetual motion machine so far?
- Which is the most expensive coffee in the world?
- Who brought the idea of a leap year in our calendar, and why?
- Which is the world’s largest construction in terms of ground area?
- Who is the inventor of sellotape? (Richard G. Drew)
- Is it true that Egyptians made the first perfect calendar?
- Why dates and years are different in different calendars?
- Which is the world’s fastest railway train?
- Which is the longest lasting light bulb?
- Who is the actual inventor of electric light bulb, if not Thomas Edison?
- Why did Hitler choose swastika symbol as the emblem in the Nazi flag?
- Which is the largest diamond ever known? Who owns it now?
- Did any of the US presidents own slaves?
- Which is the world’s oldest city still inhabited as in the past?
- Which country was the first to use paper money as medium of exchange?
- What is the origin of the frequently used expression OK (Okay)?
- What is the origin and history of the dollar sign?
- What does the inside of Eskimos’ igloo look like?
- Why is the pointing device used for computers called mouse? And who invented it?
- Why is a road linking two cities called highway?
- Which country’s people have the highest IQ (Intelligence Quotient) level in the world?
- Which country has issued the costliest postage stamp?
- Is the Great Pyramid of Giza only Wonder of the World in its original form today?
- Who is the inventor of modern type mobile phone? (Martin Cooper)
- Who created a worldwide craze for motorcycles? From which country it started?
- Why are races run in anticlockwise direction in athletic tournaments?
- When was the Great Wall of China constructed? And what is its exact length?
- Who made Compact Disk first, Phillips or Sony?
- Is László Bíró the inventor of ballpoint pen? And what gave him the idea of making such a pen?
- What does the ‘Rx’ sign on doctors’ prescription mean?
- Who is the Inventor of ‘smiley’ symbol and what is the story of its creation?
- Who was the first to reach the summit of Mount Everest? Tenzing Norgay or Edmund Hillary?
- What’s the origin of the words post-box, postage, post office and postman?
- What is the Doomsday Clock? And what is the current time shown by it?
- Who is the inventor of a compass? Is it true that a compass never shows North and South accurately?
- Which country issued the world’s first adhesive postage stamp? And what was it called?
- What is the reason behind different skin colors in people across the world?
- Which are the ten smallest countries in the world measured in terms of area?
- Which country has the oldest army still in active service?
- Why are two sides of a coin called head and tail? Where are its roots?
- Why is British national flag called the Union Jack?
- What is the story of the New York getting its name?
- What is the difference between economic recession and depression?
- Why can’t governments regulate cryptocurrencies?
- What is the difference between Savings account and Checking account?
- What is BitConnect and how people lost all their money on it?
- Why are lots of movies released on the same day?
- How do insurance companies not go bankrupt when a natural disaster happens?
- Why do gift cards have an expiry date?
- Do governments have bank accounts? If not, where do our taxes go when paid?
- Which is the highest denominated US dollar note?
- Why doesn’t the government simply print more currency notes when a country is short of money?