News
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- Humans
DNA highlights Native American die-off
A genetic analysis points to widespread New World deaths after Europeans arrived.
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- Earth
Arctic has taken a turn for the warmer
Northern climate has changed substantially in the last five years, and the shift is probably permanent.
- Humans
Neandertals’ mammoth building project
Stone Age people’s evolutionary cousins may have constructed earliest bone structures.
- Earth
Polar ice sheets are synchronized swimmers
Glaciers in the Northern and Southern Hemispheres advance and retreat together.
- Health & Medicine
Immune booster also works in reverse
Injections of the protein interleukin-2 can calm runaway defenses that damage tissues in the body, two studies show.
- Health & Medicine
Weaker brain links found in psychopaths
Decreased communication between emotional and executive centers may contribute to the mental disorder.
- Space
Christmas gamma-ray burst still puzzles
Nearly a year after receiving a spectacular celestial gift, astrophysicists are still asking: “What is it?”
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- Life
Biology’s big bang had a long fuse
The fossil record’s earliest troves of animal life are the result of more than 200 million years of evolution.
- Humans
Cooking can be surprisingly forgiving
Network analysis confirms deviations from the recipe are quite feasible.
