How do free electrons originate?

Scientists at Max Planck Institute of Plasma Physics (IPP) in Garching and Greifswald and Fritz Haber Institute in Berlin, Germany, have discovered a new way in which high-energy radiation in water can release slow electrons. ...

Why archaeologists usually rebury their excavations

Hadrian's Wall in Northern England is a popular tourist spot for those interested in British history. Visitors this year will get the chance to see the Roman bathhouse at Birdoswald before it is reburied by archaeologists.

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