Kristin Hugo

Animals, plants, fungi, and even bacteria adhere to the 24-hour cycle, also known as a circadian rhythm, 24-hour internal clock, or sleep-wake cycle.

These animals were basically the same, even when T. Rex roamed the Earth.

The scientists hope they weren't interrupting a courtship session.

It's a long shot, but immortality never came easy.

These insects can propel themselves skywards without even using their legs.

You may want to learn to embrace your indoor insects—or move.

Aloha oe, aloha oe, until we meet again.

Maybe early puberty is to blame.

Save the toebeans!

More than half of North Atlantic Right Whale deaths since 2009 were from becoming entangled with nets.

Félicette. Never Forget.

In German, they'd call us "Spargeltarzan."

The exact cause is still a mystery, though a prime suspect has been named.

More animal cognition research shows that they can recognize Barack Obama and Emma Watson.

Embalming is now considered a dangerous practice.

Animal abusers are much more likely to hurt and kill other humans.

Mayoral candidate says the fungi saved him from heroin.

Was it crocodiles, hominids, or something else that damaged these bones?

"I only help her with changing the brushes," says her owner.

Pedicures shouldn't be painful (or dangerous).

Noise pollution is getting in the way of these fish's mating rituals.

You can see inside without unwrapping this mummy.

Several extinct members of the giraffe family found in Madrid are shockingly weird-looking.

Before, there were six nonhuman great apes. Today there are seven.

This bulbous-headed animal had to learn to fit in with her sleeker cousins.

Cows perform complex tasks, are social, and have different personalities.

Five enormous neck bones held all the clues.

Bats are excellent for the environment. Just don't touch them.

If you donate your body to science, where does it really end up?

It might look weird to humans, but it looks cool to female moths.