News
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Health & MedicineWhite dental fillings may impair kids’ behavior
Effects seen only for fillings that used bis-GMA, a resin derived from bisphenol A.
By Janet Raloff -
LifeInsulin may be Big Antler hormone
Extra sensitivity to the hormone in certain developing tissues might give animals their oversized weapons and ornaments.
By Susan Milius -
LifeSkinny searchers keep fat ants full
By controlling movement out of an ant nest, researchers discover that ants weigh tubbiness in deciding who hunts for food.
By Meghan Rosen -
HumansEarly Americans took two tool tracks
Creators of separate spearhead styles colonized North America more than 13,000 years ago.