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Kissing goes back 21 million years, to the common ancestor of humans and other large apes, study findsScientists traced kissing back to a primate ancestor that lived around 21 million years ago.
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Can you speak cat? Scientists develop quiz that reveals how well you understand our feline friendsCats are excellent at communicating, but humans still routinely misunderstand them.
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Chimps 'think about thinking' in order to weigh evidence and plan their actions, new research suggestsChimpanzees use a variation of the "scientific method" — discarding prior beliefs if convincing new evidence comes along to change their minds, research shows.
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Lab monkeys on the loose in Mississippi don't have herpes, university says. But are they dangerous?Authorities have killed several lab monkeys that escaped from an overturned truck in Mississippi. The rhesus macaques were initially thought to be diseased and dangerous, but that's not necessarily the case.
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Jane Goodall revolutionized animal research, but her work had some unintended consequences. Here's what we've learned from them.Following Jane Goodall's death, chimp experts explain how her early observations still influence our understanding of our ape cousins.
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The viral 'Chicago Rat Hole' wasn't actually made by a rat, scientists claimAfter researching the rodent indent, scientists are over 98% sure it came from a squirrel.
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Some naked mole rats are designated toilet cleaners, study suggestsNaked mole rats may have specific roles, such as cleaning the toilet chamber or transporting waste, rather than being generalist helpers. The findings suggest naked-mole-rat colonies are even more complex than we thought.
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Asian golden cat: The 'feline of many costumes' that plucks birds before eating themThe Asian golden cat is an elusive creature endemic to South and Southeast Asia. It is known to take down prey much larger than itself, including buffalo calves, baby deer and small muntjacs.
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From tool use to warfare — here are 5 ways Jane Goodall revolutionized our knowledge of chimpanzeesPioneering primatologist Jane Goodall has died at age 91. These are her five biggest contributions to how we understand about our closest living relatives.
