News
- Life
Polar bears older than previously thought
New analysis reveals that the Arctic species dates back to about 600,000 years ago.
- Chemistry
Synthetic heredity molecules emulate DNA
Scientists have created six XNAs that, like the genetic building blocks they mimic, can store and pass on hereditary information.
- Health & Medicine
Attention tunes the mind’s ear
Brain activity shows how one voice pattern stands out from the crowd.
- Space
Hunt for cosmic ray source falls short
After failure to detect neutrinos from gamma-ray bursts, scientists might need to revise theories.
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