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Planetary ScienceAn asteroid may have exploded over Antarctica about 2.5 million years ago
Tiny spherules of rock found in Antarctic ice may point to the oldest known “airburst,” or midair disintegration of an incoming asteroid.
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ChemistryThe smallest known molecular knot is made of just 54 atoms
Chemists are still trying to figure out why this combination of gold, phosphorus, oxygen and carbon atoms resulted in a molecular knot in the first place.
By Anna Gibbs -
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Using public health research to save lives
Editor in chief Nancy Shute discusses how overdose prevention centers, where people can use drugs in a supervised setting, are saving lives.