Science
Chlamydia is cured by taking a single pill and waiting a week before engaging in sexual activity. If everyone on Earth took the chlamydia pill and kept it in their pants for a week, would we essentially eradicate chlamydia? Why or why not? »
Why do nearsighted people need a prescription and a $300 pair of glasses, while farsighted people can buy their glasses at the dollar store? »
For humans, sea water is not drinkable due to its high salt content. How do whales, manatees, seals, and other sea faring mammals stay hydrated? »
Why do we have to 'fall' asleep? Why can't we just decide to be asleep? »
Does the size of a creature, or the size of its eye, affect what can be seen by the 'naked eye'? for example, can ants see things we consider microscopic? are ants microscopic to elephants? »
Do heavily forested regions of the world like the eastern United States experience a noticeable difference in oxygen levels/air quality during the winter months when the trees lose all of their leaves? »
If hand sanitizer kills 99.99% of germs, then won't the surviving 0.01% make hand sanitizer resistant strains? »
What is the point of using screws with a Phillips head, flathead, allen, hex, etc. instead of just having one universal screw type? »
What % of my weight am I actually lifting when doing a push-up? »
If we could travel at 99.9% the speed of light, it would take 4 years to get to Alpha Centauri. Would the people on the spaceship feel like they were stuck on board for 4 years or would it feel shorter for them? »
Do giraffes get struck by lightning more often than other animals? »
Why is it that during winter it's not uncommon to have days with abnormally high temperature and summer-like weather, but in the summer it never drops to winter-like weather for a day? »
What are we smelling when we open a fresh can of tennis balls? »
Was the super massive black hole at the center of the Milkyway ever anything else? »
In HBO's Chernobyl, radiation sickness is depicted as highly contagious, able to be transmitted by brief skin-to-skin contact with a contaminated person. Is this actually how radiation works? »
Why do computers and game consoles need to restart in order to install software updates? »
What is the purpose of utilizing screws with a Phillips' head, flathead, Allen, hex, and so on rather than simply having one widespread screw compose? »
Is not wanting to have kids becoming more common? »
If there is indeed microbial life on Venus producing phosphine gas, is it possible the microbes came from Earth and were introduced at some point during the last 80 years of sending probes? »
If a fever helps the body fight off infection, would artificially raising your body temperature (within reason), say with a hot bath or shower, help this process and speed your recovery? »
How do radio stations know how many people are tuning in? »
If the Niagara falls is frozen where does all the water go behind it? Does it just spill over and flood surrounding land »
Does washing off fruits and vegetables before eating them actually remove much of the residual preservatives and/or pesticides? »
Can a venomous snake commit suicide by biting itself ? »
The last time atmospheric CO2 levels were this high the world was 3-6C warmer. So how do scientists believe we can keep warming under 2C? »
Do bees that get lost (f.e.riding a bus) get adopted by local colonies ? »
So atmospheric CO2 levels just reached 410 ppm, first time in 3 million years it's been that high. What happened 3 million years ago? »
When I breathe in dust, how does it eventually leave my body? »
Africa declared that it is free of polio. Does that mean we have now eradicated polio globally? »
Why can cannabis be detected in urine weeks after use while other drug traces dissipate after days? What properties set it apart in that regard? »
Are there ocean deserts? Are there parts of the ocean that never or rarely receive rain? »
If you melt a magnet, what happens to the magnetism? Does the liquid metal retain the magnetism or does it go away? »
Why do we have to kill a horse when it broke its leg? What is the difference in biological processes between man and horse in bone mending? »
When our brain begins to lose its memory, is it losing the memories themselves or the ability to recall those memories? »
Similar to increasing wealth gap, are we experiencing an increasing educational gap? Are well-educated getting more educated and under-educated staying under-educated? »
Why does electricity always hum at a B-flat pitch? »
Why do cognitive abilities progressively go down the more tired you are, sometimes to the point of having your mind go 'blank'? »
Is it possible for a deck of cards to be shuffled accidentally into perfect order? »
The earth is about 4,5 billion years old, and the universe about 14,5 billion, if life isn't special, then shouldn't we have already been contacted? »
Why do clones die so quickly? »
Is a single Elephant's skin cell bigger than a human's skin cell? »
How do we know we’ve discovered a new species of human based on a single fossil, and not just a really ugly dude? »
My parents told me phones and tech emit dangerous radiation, is it true? »
Does a burnt piece of toast have the same number of calories as a regular piece of toast? »
Does the brain interact with programming languages like it does with natural languages? »
Are humans closer in relative size to the planck length or the entire observable universe? »
If we could drain the ocean, could we breath or live on the deepest parts or would pressures, temperatures, and oxygen levels be too extreme for us to live such as high altitudes? »
Do any other species besides humans bury their dead? »
What elements are at genuine risk of running out and what are the implications of them running out? »
How many people can one tree sufficiently make oxygen for? »
If climate change is a serious threat and sea levels are going to rise or are rising, why don’t we see real-estate prices drastically decreasing around coastal areas? »
Why do city pigeons so often have mutilated feet? »
Is there any reason for the alphabet being in the order its in? »
Wide hips are considered a sign of fertility and ease of birth - do we have any evidence to support this? »
When in human history did we start cutting our hair? »
Why don't we just boil seawater to get freshwater? I've wondered about this for years. »
Ethiopia is building the largest hydroelectric power plant in Africa, Egypt opposes the dam which it believes will reduce the amount of water that it gets, Ethiopia asserts that the dam will in fact increase water flow to Egypt by reducing evaporation on Egypt's Lake Nasser, How so? »
I saw a video of someone breathing in a rag of chloroform and getting instantly knocked out. I don’t think that’s real, but it made me curious. How does chloroform work? And what exactly does it do? »
Is there really no better way to diagnose mental illness than by the person's description of what they're experiencing? »
Why don't humans have mating seasons? »
How do pilots know during a flight when there is turbulence coming? They turn on the fasten seat belt sign, and then it gets bumpy. The turbulence ends, and then they turn off the fasten seat belt sign. »
Numerically there have been more deaths from the common flu than from the new Corona virus, but that is because it is still contained at the moment. Just how deadly is it compared to the established influenza strains? And SARS? And the swine flu? »
We encounter static electricity all the time and it's not shocking (sorry) because we know what's going on, but what on earth did people think was happening before we understood electricity? »
Ages 1 to 4 are very important for brain development but yet most people can't recall anything from that time period. Why don't we remember our earliest memories? »
Keep hearing that we are running out of lithium, so how close are we to combining protons and electrons to form elements from the periodic table? »
What happened to acid rain? I remember hearing lots about it in the early 90s but nothing since. »
Do any non-human animals deliberately combine foods for eating simultaneously? Do any prepare meals with more than one ingredient? »
Can you kill bacteria just by pressing fingers against each other? How does daily life's mechanical forces interact with microorganisms? »
Are there crazy caves with no entrance to the surface pocketed all throughout the earth or is the earth pretty solid except for cave systems near the top? »
In the Tv series 'Chernobyl' how realisticaly depicted are the effects of intense radiation exposure? »
The recent fire in London was traced to an electrical fault in a fridge freezer. How can you trace with such accuracy what was the single appliance that caused it? »
Does a cat purr manually or automatically? Is it aware of it's own purring? Does purring have an effect on the cat? »
When did people realize that a whip crack was breaking the sound barrier? What did people think was causing that sound before then? »
How does a computer network like HBO's handle the massive output of data for short bursts of time, like a GoT episode? »
Why can hormone therapy make a clitoris grow but can't make a penis grow? »
People having psychotic episodes often say that someone put computer chips in them - What kinds of claims were made before the invention of the microchip? »
If Hubble can make photos of galaxys 13.2ly away, is it ever gonna be possible to look back 13.8ly away and 'see' the big bang? »
If my 60 GB phone is full or empty, is there any difference in weight at the nano level? »
If light can travel freely through space, why isn’t the Earth perfectly lit all the time? Where does all the light from all the stars get lost? »
How realistic is the cancer 'vaccine' talked about recently? »
The freezing point of carbon dioxide is -78.5C, while the coldest recorded air temperature on Earth has been as low as -92C, does this mean that it can/would snow carbon dioxide at these temperatures? »
If a heart is a muscle, why doesn’t it ever get tired of beating but things like my arms and legs do? »
If nuclear waste will still be radioactive for thousands of years, why is it not usable? »
Can fish live (or at least breathe) in liquids that are not water? For example milk »
The Human Genome Project cost $2.7 billion. 20 years later, it costs <$1000 to sequence the genome. Was the cost of the project fundamentally necessary for subsequent progress, or could we have 'waited' for the technology to become cheaper? »
In 'Interstellar', shouldn't the planet 'Endurance' lands on have been pulled into the blackhole 'Gargantua'? »
What is the “pins and needles” feeling that happens when you cut off circulation to a part of your body? »
With the US now withdrawn from the WHO, how badly will that affect the seasonal flu vaccine development? »
Can a photon, from a source other than the sun, pass through the sun completely? In summary, does the sphere of the sun cast a shadow if there were a much brighter light source on the other side of it? »
How will the waters actually recede from Harvey, and how do storms like these change the landscape? Will permanent rivers or lakes be made? »
How do women astronauts deal with periods in antigravity? »
Is the morphology between human faces significantly more or less varied than the faces of other species? »
What does catnip actually do to cats? »
Since light stops penetrating water at 1000 meters deep and the deepest freshwater lake is 1642 meters deep(both according to Google), is there an equivalent to deep sea creatures for freshwater? »
How 'green' is the life cycle of a solar panel end-to-end compared to traditional energy sources? »
South Korea just got hit with a 5.4 magnitude earthquake. 3 days ago, North Korea carried out a nuclear weapons test that caused a 5.3 magnitude seismic event. Is it possible that today's earthquake is a result of the nuclear testing several days ago? »
Why do astronauts breathe 100% oxygen? »
How do dolphins sleep. If dolphins need air to breathe then how do they sleep underwater? »
Do parrots and other talking birds teach wild birds to talk when released into the wild? »
When a banana gets bruised, does the nutritional content of the bruised area change? »
If you placed wood in a very hot environment with no oxygen, would it be possible to melt wood? »
Does an obese person have more blood in their body than a person with a optimal body mass index? »
Later this year, Cassini will crash into Saturn after its 'Grand Finale' mission as to not contaminate Enceladus or Titan with Earth life. However, how will we overcome contamination once we send probes specifically for those moons? »
When octopus/squid/cuttlefish are out of the water in some videos, are they in pain from the air? Or does their skin keep them safe for a prolonged time? Is it closer to amphibian skin than fish skin? »
What happened with Zika, is it gone now? »
New Horizons flies by Pluto in 33 Minutes! - NASA Live Stream »
Why can't we perform a Pancreas transplant for those with Diabetes? »
Are there seasons in the deep ocean? »
How is the universe (at least) 46 billion light years across, when it has only existed for 13.8 billion years? »
Does running a mile in 10 minutes burn the same number of calories as walking a mile in 20 minutes? »
Can the ancient magnetic field surrounding Mars be 'revived' in any way? »
When did scientists realize that Jupiter had no solid ground? »
The Gunpowder Plot involved 36 barrels of gunpowder in an undercroft below the House of Lords. Just how big an explosion would 36 barrels of 1605 gunpowder have created, had they gone off? »
What is the bottom of the Sahara desert like? Like underneath the sand, what condition is the bedrock in? »
If a 20 year old gets an organ transplant from a 50 year old, 30 years later is that organ functioning as if it were 80 years old or 50 years old? »
Why does our brains tend to recall bad memories and make us in a bad mood rather than recall good memories and make us in a good mood more often? »
Could a single celestial body be as large as the Milky Way galaxy? If not, what is restricting the size of it? »
Does properly stored water ever expire? »
Besides cilantro, are there any other ingredients that have been identified to taste different to people based on their genetics? »
Do other Great apes pee holding their penises with their hands or is that just humans? »
If someone was to cover their eyes for a year straight without seeing any light, would it just be really bright when they take it off then slowly adjust back to normal or would it have a permanent affect on the persons vision? »
Why does my shower curtain seem to gravitate towards me when I take a shower? »
How can we hear the voice in our head and how is it produced? »
What determines the lifespan of a species? Why do humans have such a long lifespan compared to say a housecat? »
Wikipedia states, 'The human nose is extremely sensitive to geosimin [the compound that we associate with the smell of rain], and is able to detect it at concentrations as low as 400 parts per trillion.' How does that compare to other scents? »
Why does hitting the top of a bottle of beer with another bottle of beer create that much froth? »
If I put a flashlight in space, would it propel itself forward by 'shooting out' light? »
If you picked a random spot in the middle of the ocean would it be teeming with life? Or are there huge dead zones with no fish around? »
Does the force of ejaculation influence the probability of impregnation, or is this only determined by the swimming speed of individual sperm cells? »
How deep or shallow can the sand be in a desert? »
Is a cure for tinnitus actively being worked on by anyone? And if so, what progress has been made? »
The video game 'Subnautica' depicts an alien planet with many exotic underwater ecosystems. One of these is a 'lava zone' where molten lava stays in liquid form under the sea. Is this possible? »
Why do we use pillows now when we sleep? Did we need this during the prehistoric/ancient age? What changed? »
Why haven’t black boxes in airplanes been engineered to have real-time streaming to a remote location yet? »
As you age hair sprouts in places it didn't grow - what's happening with the follicles? Are they new or dormant ones awakening? »
Theoretically the efficiency of a solar panel can’t pass 31 % of output power, why ?? »
If you were to randomly find a playing card on the floor every day, how many days would it take to find a full deck? »
A credible SARS-NCOV vaccine manufacturer said large scale trials shows 90% efficiency. Is the vaccine ready(!)? »
The all-green picture with 'red' strawberries picture. Do I see red because I know ripe strawberries are red? »
CPUs have billions of transistors in them. Can a single transistor fail and kill the CPU? Or does one dead transistor not affect the CPU? »
If we return to the moon, is there a telescope on earth today strong enough to watch astronauts walking around on the surface? »
Didn't the person who wrote world's first compiler have to, well, compile it somehow?Did he compile it at all, and if he did, how did he do that? »
If doctors can fit babies with prescription eye ware when they can't talk, why do they need feedback from me to do the same thing? »
Why doesn't modern healthcare protocol include yearly full-body CAT, MRI, or PET scans to really see what COULD be wrong with ppl? »
Babies survive by eating solely a mother's milk. At what point do humans need to switch from only a mother's milk, and why? Or could an adult human theoretically survive on only a mother's milk of they had enough supply? »
Do animals have blood types like we do? »
How can cheese be 'aged' so long, but when it's in my fridge for longer than a few weeks it goes mouldy? »
If iron loses it's magnetism around 800 degrees C, how can the earth's core, at ~6000 degrees C, be magnetic? »
What happened to all the bugs that used to splatter on the windshield years ago? »
There are thousands of seemingly isolated bodies of water all throughout the planet which happen to have fish in them. How did they get there if truly isolated? »
How much does drinking a cold drink really affect your body temperature? »
Is the average human being closer to the size of the entire observable universe or closer to 1 planck lenght? »
How are we able to perform a body transplant when we can't repair spinal injuries? »
Why do we lose the desire to eat while we are sick? (Ex. when having a cold, I lose the desire to eat) »
Why do dogs have such extreme diversity in size, shape, and attributes when compared to cats? »
When a person gets a cut, is it better to wipe off the blood or let the blood coagulate to protect the cut? »
Why can't we just inject a ton of power into a phone at once to instantly charge it? Is that just too dangerous, or just not possible? »
We hear all about endangered animals, but are endangered trees a thing? Do trees go extinct as often as animals? »
When someone is dying of hunger or thirst, is there a 'point of no return' after which they are still alive but if they were given food or water their body would not be able to absorb it fast enough to survive? »
Yuo're prboably albe to raed tihs setencne. Deos tihs wrok in non-alhabpet lanugaegs lkie Chneise? »
Assuming ducks can't count, can they keep track of all their ducklings being present? If so, how? »
The universe is said to be around 23% dark matter, 72% dark energy and 5% ordinary matter. If we don't know what dark matter and dark energy are, where do the percentages come from? »
If each day is only 23h56m4s, over the course of 4 years, we accumulate 95.7 hours of unaccounted time when approximating each day to 24 hours. We give ourselves one extra day in February, which accounts for only 24 hours of that extra time, but where does that extra 71.7 hours go? »
Can an insect be “fat”? How do they store energy? »
Why do we get random thoughts of violence that we discard? »
Why is the human nose the shape it is? Why isn't it just two holes in our face? »
What are the most commonly accepted theories of consciousness among scientists today? »
If dividing by zero is undefined and causes so much trouble, why not define the result as a constant and build the theory around it? (Like 'i' was defined to be the sqrt of -1 and the complex numbers) »
What is the physiological difference between the tiredness that comes from too little sleep and the tiredness that comes from exertion? »
Why are car antennas so small now, when 10 years ago they were 2-3 feet tall? »
Does the sun have a solid(like) surface? »
How much of sleep is actual maintenance downtime, and how much is just time-killing energy conservation? »
Why are Primates incapable of Human speech, while lesser animals such as Parrots can emulate Human speech? »
Theoretically, if the whole world isolates itself for a month, could the flu, it's various strains, and future mutated strains be a thing of the past? Like, can we kill two birds with one stone? »
Who feels the umbilical cord being cut? Mother, child or both? »
If you put a Garden in the ISS, Could you have infinite oxygen? »
What is the gold and silver foil they put on satellites and why is it important? »
Does sipping water vs 'chugging' water impact how the body processes water? »
How do third party headphones with volume control and play/pause buttons send a signal to my phone through a headphone jack? »
Do dogs of one breed prefer to be with their own breed over others or are they all just dogs to them? »
What is the white stuff inside pimples? What it's made out of, why we have it, and why does it exit in this way? »
Why do airplanes need to fly so high? »
As we begin covering the planet with solar panels, some energy that would normally bounce back into the atmosphere is now being absorbed. Are their any potential consequences of this? »
What does 'The Universe is not locally real' mean? »
Let’s say we open up a completely sealed off underground cave. The organisms inside are completely alien to anything native to earth. How exactly could we tell if these organisms evolved from earth, or from another planet? »
How do we know what Ancient Egyptian (or any ancient language) sounded like? How accurate are names like “Osiris” and “Tutankhamen” to what they actually sounded like when spoken by Ancient Egyptians? »
How do scientists know we've only discovered 14% of all living species? »
I know there is a correlation between elevation/altitude and suicide. I moved to a place at 8000 ft 7 years ago. I now have 6 people I know that have killed themselves. I had zero before moving here (in my 40's). Why? »
Using a CPAP can increase the life span of a Sleep Apnea patient by 7 years. What does Sleep Apnea do to the body that reduces life expectancy this much? »
If a bottle is completely filled with water and I shake it. Does the water still move inside? »
Why do we hear about breakthroughs in cancer treatment only to never see them again? »
What affect does the quantity of injuries have on healing time? For example, would a paper cut take longer to heal if I had a broken Jaw at the same time? »
I just looked at the sun with my eclipse glasses, and there are two black dots on the sun. What are those? »