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Evolution

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guppies

LIKES FLASHY GUYS  Brain size in a female guppy (left) turns out to affect her taste in males. Bigger brains go with a preference for a colorful guy (right) instead of some dim dud.

new dino evolutionary tree

NEW WAY TO RELATE  The dinosaur evolutionary tree just got a makeover. One outcome of the proposed rearrangement is that meat-eating evolved twice in dinosaurs (in groups represented by Tyrannosaurus rex, bottom middle, and Staurikosaurus, right), as did traits associated with plant-eating (groups represented by Brontosaurus, left, and Triceratops, top middle). 

upper jaw from Neandertal

Calcified dental plaque from the upper jaw of a young Neandertal male from El Sidrón cave in Spain reveals insights into his vegetarian diet and dental health problems.

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