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Why do some cat siblings look so different?Normally, siblings resemble each other. So why does a litter of kittens often come in a variety of colors?
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Scientists discover new type of lion roarResearchers used artificial intelligence to analyze more than 3,000 recordings of African lions and found that the animals have an "intermediate" roar as well as a "full-throated" roar.
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'A forest with bonobos has never been so quiet': Most extreme case of violence in 'hippie' species recorded, with females ganging up on male in unprecedented attackFemale bonobos routinely form coalitions to stamp out threats from males, but the level of violence in this attack was unprecedented.
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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.
