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Why does hunger sometimes cause nausea?If it’s been hours since you last ate, you should be starving — but why does hunger sometimes cause nausea instead?
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How does cannabis get you high?It apparently comes down to THC and endocannabinoid receptors in the brain.
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How long is a galactic year?Just as Earth orbits the sun, our sun orbits the galaxy.
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What is consciousness?Do non-human animals have consciousness, too?
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Why are humans so curious?Curiosity may explain how humans have survived as a species.
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Ancient Maya kingdom with pyramid discovered in southern MexicoThe kingdom has the remains of a temple and unique stone carvings.
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How do we tell the difference between geologic ages?Earth's history is long. How do scientists keep track of what happened when?
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Can you 'turn off' a nightmare?With lucid dreaming, people can stop or even control their dreams.
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What Causes Static Electricity?Static electricity is so common that it's easy to forget how weird it is.
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What's The Biggest Animal That a Snake Can Swallow?A complex network of skull bones, ligaments and muscles allows a snake to swallow prey with bodies much larger than the sinuous predator's own head.
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The Voracious and Invasive Lionfish Is Taking Over the Atlantic. Here's Why.The striking lionfish is invading the Atlantic Ocean, eating its way through coral reef after coral reef.
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The Most Surprising Elephant Relatives on EarthWould not have guessed it.
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Why Is Mold Fuzzy?Why is mold fuzzy, and is this fuzz dangerous to eat?
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Does drinking chamomile tea really help people fall asleep?Does drinking chamomile tea actually make people sleepy?
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Why Do Lobsters Turn Red When They're Cooked?As any lobster connoisseur knows, this crustacean turns bright red when it's heated. Why does this dramatic color transformation happen?
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Why Does Mint Make Your Mouth Feel Cool?If you nibble on a mint leaf, you might notice that it makes your mouth feel cool. That's because mint, much like chili peppers, is a biochemical success story — for plants, at least.
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Stonehenge's Massive Megaliths May Have Been Moved into Place with Pig LardStonehenge's massive megaliths may have been moved with more than just elbow grease.
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Why haven't all primates evolved into humans?Humans did not evolve from apes, gorillas or chimps. We share a common ancestor and have followed different evolutionary paths.
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We Are Very Close to Completely Eliminating Male Embryos (in Mice)The catch is that it requires genetically altering the parents, too.
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A Massive Seaweed Bloom Is Smothering Life from the Caribbean to West AfricaResearchers call it the Great Atlantic Sargassum Belt.
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Why Do People Scrunch Up Their Faces After Tasting Something Sour?Why do we give such a sour-looking response to sour foods?
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Sperm Can Survive Microgravity, but Don’t Expect Any Space Babies SoonFrozen sperm didn’t seem fazed by several loop the loops in an aerobatic plane, but that’s a far cry from showing that they would make a healthy baby in space.
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Why Do Some People Always Get Bitten by Mosquitoes, While Others Don't?Some people can sit outside all summer long and not suffer from mosquito bites. Others turn into an itchy mess despite bathing in DEET and never leaving the purple glow of the bug zapper. What gives?
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Arctic Permafrost Is Going Through a Rapid Meltdown — 70 Years EarlyIt's all happening way faster than anyone expected.
