Animal Facts

Learn about some of the strange and unusual facts and terms in the animal kingdom.

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There Are Multiple Theories for Why Dogs Tilt Their Heads

If you think there's one easy explanation behind this cute canine behavior, think again.

Your Dog or Cat Can Have Depression, Too

But how do you diagnose a pet's mental state when it can't talk to you?

10 Animals With Better Jobs Than You

Hate to say it, but some animals have jobs that are far more interesting — and more lucrative — than yours. Who are these lucky dogs?

Gaze Into the Disappearing Mouth of the Hydra

The Hydra is a fearsome, tiny predator that stings and swallows its prey — through a mouth it had to rip its own skin to create. But how does it do that?

New Study: Fear Alone, Replacing Actual Predators, Can Change Ecosystems

The only thing we have to fear is fear itself, said FDR, but he wasn't a biologist. Scientists examined what impact the fear of apex predators can have on an ecosystem.

Feeling Sick? Snuggling With Pets Won't Hurt Them, Could Help You

Don't worry about transmitting the cold or flu to your furry friends. In fact, some time cuddled up can help with your sickness.

Should Other Animals Have the Same Rights (and Responsibilities) As Humans?

Will we witness personhood for other animals in our lifetime? It's not out of the question, thanks to a recent court decision.

9 Times Interspecies Friendship Worked Out OK

In times of strife and conflict, it's good to remember that differences are OK. Here's a dose of adorable: nine interspecies interactions that didn't end up in a meal.

10 Weird Ways Organisms Reproduce

No matter what your imagination can cook up, real life is weirder. Whether it's parasitic wasps or super-controlling ferns, reproduction can be mysterious, gross or even scary.

Did a Russian lake flash-freeze a herd of horses?

Picture a herd of hundreds of horses fleeing a burning forest and running headlong into a wintery lake, which quickly flash-freezes the whole lot of them. Sounds pretty gruesome — and flat-out unbelievable. But did it actually happen? Could it?

Do animals laugh?

Researchers have investigated whether animals are capable of making a unique sound in response to joy.

What's the largest land animal of all time?

Just how big do animals come? Dive backward through time and the fossil record in search of the most colossal member of kingdom Animalia.

How Animal Imprinting Works

Ever wonder why some birds end up following a mother of another species? It has a lot to do with who (or what) is around when they hatch. So maybe keep your distance the next time you spot a nest.

HowStuffWorks: Zoo Atlanta’s New Slimy, Scaly Spectacular

Join HowStuffWork's Robert Lamb as he visits Zoo Atlanta's new Scaly Slimy Spectacular home for reptiles and amphibians.

10 Insects We Love to Study

They're found in stupendous numbers, they don't take up much lab space and they have an awful lot to teach us about the world and its residents. Meet 10 of the insects we just can't stop studying.

10 Recent Breakthroughs in Marine Biology

Marine biologists have discovered a lot about the ocean's residents while you were busy dozing on the beach. We've dug up 10 of their coolest discoveries.

Is hippo milk really pink?

The pink hippo milk myth is the ultimate lesson for those who believe everything they read on the Web.

Has a whale ever swallowed someone alive?

Fancy yourself a modern-day Jonah? Keep in mind that this most famous of whale tales never scientifically considers if a whale has ever really swallowed someone alive.

Are there really elephant graveyards?

The elephant graveyard lends an air of romance and mystery to the mighty animal, but in reality, it's just a myth.

Are dogs colorblind?

Your dog sees the world in color, not in black and white. Though dogs are often described as colorblind, they see much more than you'd expect.

Can animals count?

Pet owners love to brag about their furry friends, but have you ever wondered whether your dog or cat can count? You may be surprised to learn about the mathematical prowess of some common animals.

Can animals understand human language?

Many humans are sure their pets understand a variety of commands – but what do the experts have to say? Read on to find out exactly how much animals grasp the English language.

Do mice really love cheese?

If you're plagued by rodents, the only sure way to catch them is to load a mousetrap with a large wedge of cheese, right? Wrong – to catch mice, think sweet!

10 Cretaceous Animals That Weren’t Dinosaurs

The dinos hog all the Cretaceous headlines. Do you have any idea what else scurried, hopped and otherwise cruised around Earth before the K-T mass extinction?

5 Food Animals That Are Smarter Than Your Pet

Meet the pig: It can employ evasive maneuvers and play video games with joysticks, among other porcine talents. Kind of a whole different take on bacon, isn't it?


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