News
- Life
Just warm enough
Mammals may have evolved a characteristic body temperature to avoid fungal infections without burning too hot.
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- Space
Newfound planet stirs old debate
The discoverers of a fourth body orbiting a nearby star say its origins pose a challenge to existing theory, but some disagree.
- Physics
Nuclear split surprises
Physicists spot a new and unexpected type of lopsided fission in the element mercury.
- Chemistry
Bacterium grows with arsenic
A microbe appears to substitute a normally toxic element for a basic ingredient of life, raising intriguing questions about the limits of biochemistry.
