After a year of fastidious planning, a microscopic sample of the ultra-rare radioactive element berkelium arrived at a Berkeley Lab. With just 48 hours to experiment before it would become ...

Partly cloudy with a slight chance of rain. Chance of precipitation 25%. High temperature around 79F. Dew point will be around 58F with an average humidity of 61%. Winds will be 6 mph from the SW.

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