News
- Earth
Uncertainty returns over sex-change fish
Scientists question whether a potentially gender-bending hormone found in polluted Florida streams is responsible for masculinized female fish.
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Grief travels different paths
A rare study of elderly individuals before and after the death of their spouses finds that a surprisingly large number stayed on an even emotional keel.
- Health & Medicine
Pet exposure may reduce allergies
Exposing children to cats or dogs at an early age may make them less prone to allergies later in life.
- Anthropology
Gene change hints at brain evolution
A genetic mutation found only in humans first appeared around 2.8
