Chemist explains the science behind fireworks

Whether you'll be watching fireworks along Boston's Esplanade or somewhere else this Fourth of July, you won't be the only one relaxing this holiday.

Cosmic particle accelerator reaches theoretical limit

With the help of special telescopes, researchers have observed a cosmic particle accelerator as never before. Observations made with the gamma ray observatory H.E.S.S. in Namibia show for the first time the course of an acceleration ...

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