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Features

Antimatter-Powered Supernovae

The largest stars die in explosions more powerful than anyone thought possible—some triggered in part by the production of antimatter

By Avishay Gal-Yam

Is Bird Flu Waiting to Explode?

By concocting bird flu viruses that could potentially spread easily among humans, researchers have ignited a debate about the need for safety versus open inquiry

By Fred Guterl

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