Featured series 
Tag: potassium rubidium
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Nation & World
Mystery of the missing molecules
When scientists moved from manipulating atoms to messing with molecules, molecules started to disappear from view. Professor Kang-Kuen Ni has figured out why.
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Nation & World
Catching lightning in a bottle
Harvard researchers have performed the coldest reaction in the known universe by capturing a chemical reaction in its most critical and elusive act.
