-
What causes the feeling of 'butterflies' in your stomach?Flutters, knots and other stomach sensations tied to nervousness are all examples of the gut-brain axis in action.
-
How did metamorphosis evolve?While it might seem like an all-or-nothing process, insect metamorphosis likely emerged through gradual evolutionary changes.
-
Why don't teeth count as bones?Teeth and bones may appear alike, but they actually have more differences than similarities.
2 Comments -
Can you actually get high from licking a toad?There's some truth to the urban legend that certain toads have psychedelic properties, but licking them isn't a good idea.
-
What's the longest someone has been clinically dead — but then come back to life?When someone's heart stops beating, their brain cells start dying within minutes. But sometimes, they can still come back from the dead.
-
Heart quiz: What do you know about the body's hardest-working muscle?Get pumped up — it's time to show off your knowledge about the heart.
-
Do figs really have dead wasps in them?Does every fig you eat really have a dead wasp inside?
5 Comments -
What's the hottest temperature the human body can endure?Researchers believe there's an upper limit to the temperature the human body can withstand — but many people could face deadly health problems before reaching that threshold.
3 Comments -
Which animal has the best hearing?Ranking who has the best ears in the animal kingdom is a tough task, but some animals push the limits of hearing far beyond what humans can imagine.
3 Comments -
Can you dream during non-REM sleep?People report vivid dreams during rapid-eye-movement sleep. But is this sleep stage really the only time we dream?
-
What are the largest rainforests in the world?Rainforests are home to half of the world's plant and animal species. Here are the five largest rainforests in the world.
-
Why do cats hate water?It's a well-known fact that most cats despise getting wet. But why?
4 Comments -
Why do cats like concrete slabs?Cat owners have noticed their pets seem to go crazy for concrete blocks. Why?
3 Comments -
Why are so many men color-blind?About 1 in 12 men is color-blind. Why doesn't this condition affect women as often?
5 Comments -
14 of the biggest birds on EarthReference From 9-foot tall ostriches to albatrosses with gargantuan wingspans, here are some of the biggest birds in the world.
Reference -
Echidnas: Facts about spiky Australian mammals that lay eggsDiscover interesting facts about echidnas, the strange platypus relative with spines, spurs and a pouch.
-
Does Mars have a moon?Mars is smaller than Earth, but does it have any moons?
-
Are cats the only animals that purr?Everyone knows what a happy cat sounds like. But are they the only animals that purr?
-
What are whole-body MRIs, and are they worth the hype?Whole-body MRI scans have risen to prominence for their alleged ability to catch many health conditions early. But are they legit?
-
What animal has the best eyesight?When it comes to exceptional eyesight, picking a clear winner is harder than you might think.
4 Comments -
Crows: Facts about the clever birds that live all over the worldDiscover interesting facts about how crows remember faces, mimic human speech and more.
3 Comments -
How do migrating birds know where they're going?To navigate the skies, birds rely on a complex sensory tool kit.
-
The sun: Facts about the bright star at the center of the solar systemDiscover interesting facts about the sun, the solar system's central star that supports all life on Earth.
-
Can adults grow new brain cells?Scientists are still debating whether the human brain is capable of growing new cells past childhood.
