The firefly is probably the Earth's most famous bioluminescent species, with over 2,000 individual species. Here's how they make their light.

The blobfish was crowned the world's ugliest animal in 2013 - a title it still defends today. But drop it 9,200 feet below sea level, and the water holds up all that flab like a push-up bra, making the fish a little more handsome.

Exercise is supposed to be good for you - but exercising too much or running too fast can have serious consequences for your body, brain, and health.

A kangaroo pouch is far more complex than a simple pocket. It has antimicrobial sweat glands, custom milk, and everything else a joey needs to grow.

Raccoons invade cities across America, drawn to the garbage we leave behind. These clever critters thwart every attempt we make to stop them.

Over 90% of adults pick their noses, and many eat those boogers. But it turns out snacking on those nose-nuggets is a bad idea.

Chances are, if you live in a city, you've encountered one or two rats on your way home. Here's the reason why it's so hard to get rid of rats in cities.

Humans can outrun any animal on this planet. Runners have enough endurance for marathons and ultramarathons because of how our bodies evolved.

Frog tongues can catch flies five times faster than you can blink. Their tongues are incredibly quick, stickier than glue, and as soft as a brain.

Cats famously land on their feet, but they use a different technique to survive high falls. Here's how they can fall 32 stories with limited injuries.

A single lone star tick bite could cause hives, shortness of breath, or even death. And it's making Americans allergic to red meat.

Why are astronauts always wearing those bulky suits? You don't NEED them, do you? Here's what would really happen to an exposed human in the void of space.

Don't waste time on brainstorming meetings. These are changes you can make in the office to increase your team's performance, according to psychologist Richard Wiseman.

If all insects vanished, civilization, as well as ecosystems throughout the world, might collapse without dung beetles, dermestids, and pollinators.

Gravity's pull prevents most beings from growing tall. But there are some lifeforms that have challenged gravity and won.

If every supervolcano erupted, billions of tons of ash and gas could flood the air, likely leading to volcanic winter, acid rain, and global famine.

The Mariana Trench is the deepest point on Earth, void of light with the pressure of 48 jumbo jets. Yet life finds a way to survive. Very weird life.