apes
One man studied apes for 50 years. He says nature isn't as cruel as you think.
On the list of animals at risk are several endangered species.
Big brains come at a big cost, however.
Some fish evolved legs and walked onto the land. Right?
An orangutan has settled into a Florida home after a court granted her personhood rights. But what is the basis for personhood?
Experts argue the jaws of an ancient European ape reveal a key human ancestor.
A long-ridiculed theory about humankind's early leap of consciousness is revived.
Big and strong? That's not what makes an alpha male, says primatolgist Frans de Waal.
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Primatologist Frans de Waal explains the primal instinct that unites humans and chimpanzees.
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Are these two laws universal throughout nature?
Orangutans join humans and bees in a very exclusive club