Body & Brain

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mouse reacting to bitter water

SENSORY DELUSION  By creating a bitter perception by tweaking nerve cell behavior in this mouse, scientists show that taste perception lies in the brain.

E. coli K12 bacterium

LOSS OF APPETITE  Experiments show that helpful gut bacteria like this E. coli K12 produce proteins that could influence the appetite of mice and rats.

women and children

EXTRA BABIES  Roundworms may act as a fertility aid: Tsimane women in Bolivia infected with the intestinal parasites may have more children than uninfected women. 

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