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Dogs lick humans for all types of reasons. But do they really lick us to tell us they love us?

Evolution is a never-ending process, but some scientists believe it might be speeding up as human activity impacts the environment.

The largest eagle in the world has a claw the size of a grizzly bear's, a leg the size of a human's and a very disapproving gaze.

Not all human foods are safe for dogs to eat. HowStuffWorks looks at 10 foods that are toxic to dogs.

We make a big deal about modern humans being smarter than Neanderthals, but, really, are we?

The hamsa, a depiction of a human hand, often with a central eye motif, is a protective symbol meant to ward off evil.

Anyone who's ever regretted a haircut has probably wondered how fast their hair will grow back. It's a good question, with a not-so-simple answer.

The trolley problem looks to explore the concept of human morality and a philosophical view of consequentialism. Learn about the trolley problem.

Macaws mate for life, can speak human words and have even been known to blush when delighted.

You hear your cat meowing in the middle of the night and wonder, can cats cry like humans do?

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