News
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ArchaeologyEarliest known stone tools unearthed in Kenya
East African discoveries suggest stone-tool making started at least 3.3 million years ago.
By Bruce Bower -
AstronomyPeeks into early life of supernovas show how to blow up a star
Multiple supernovas show off some of the ways a star can explode.
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Health & MedicineSnagging blood clots upgrades stroke care
A new device threaded up to the brain via catheter can unblock vessels in cerebral arteries, studies show.
By Nathan Seppa -
Planetary ScienceSea salt may stripe Europa’s surface
Salt deposits on Jupiter’s moon Europa might be responsible for brown stripes on the icy satellite’s surface.