Body & Brain

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tattoo

SCRATCH THAT  Tattoos can irritate the skin for years; red ink may be the most aggravating color. 

display of lollipops

A new study shows that the simple sugar fructose has different effects on human behavior than glucose. But it’s doesn’t tell us much about what those lollipops will do to our health or behavior.

Twins

MATCHED PAIR  Studies of more than 14 million sets of twins indicate that human traits, on average, are dictated equally by genes and environment.

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