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Paper wasps punish peers for misrepresenting their might

Falsely advertising one's fighting ability might seem like a good strategy for a wimp who wants to come off as a toughie, but in paper wasp societies, such deception is discouraged through punishment, experiments at the University ...

Why chimpanzees attack and kill each other

Bands of chimpanzees violently kill individuals from neighboring groups in order to expand their own territory, according to a 10-year study of a chimp community in Uganda that provides the first definitive evidence for this ...

Why a whiff of cats or rats is scary (if you're a mouse, that is)

If you were a mouse, a mere whiff of a cat, rat or snake would be enough to send you into a fearful state. Your stress hormone levels would go up and you'd begin to take extra precautions, hugging the ground as you carefully ...

Study shows costs and benefits of testosterone in birds

Do nice guys finish last, or will the meek inherit the earth? A new study published in The American Naturalist suggests that, at least for birds, the right answer is somewhere in between.

'Peter Pan' Apes Never Seem To Learn Selfishness

(PhysOrg.com) -- Sharing is a behavior on which day care workers and kindergarten teachers tend to offer young humans a lot of coaching. But for our ape cousins the bonobos, sharing just comes naturally.

Fish with attitude: Some like it hot

Coral reef fish can undergo a personality change in warmer water, according to an intriguing new study suggesting that climate change may make some species more aggressive.

Studies suggest males have more personality

(PhysOrg.com) -- Males have more pronounced personalities than females across a range of species - from humans to house sparrows - according to new research. Consistent personality traits, such as aggression and daring, are ...

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