For some feathered dinosaurs, bigger not necessarily better

Every kid knows that giant carnivores like Tyrannosaurus rex dominated the Cretaceous period, but they weren't the only big guys in town. Giant plant-eating theropods – close relatives of both T. rex and today's birds – ...

Imitation breeds war in new evolutionary theory

When anthropologists consider the origins of warfare, their evolutionary theories tend to boil it down to the resource-scarcity trifecta of food, territory and mates—three resources that would justify the loss of life and ...

Two theories on why we're nice

It's nearly impossible to write objectively about the science of human kindness, cooperation and altruism if you are, in fact a human being. That's especially true now that there's a rift going on in the evolution community ...

A social bacterium with versatile habits

Related individuals of a soil bacterial species live in cooperative groups and exhibit astonishing genetic and behavioural diversity. ETH researchers recently published these findings in Science .

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