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The most neutron-rich matter that can be made on Earth--the nucleus of the helium-8 atom--has been created, trapped and characterized by researchers. This new measurement gives rise to several ...

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In a feat of modern-day alchemy, atom tinkerers have fooled hydrogen atoms into accepting a helium atom as one of their own. The camouflaged atom behaves chemically like hydrogen, but has four times ...

First discovered in the corona surrounding the sun and later found in gases leaking from Mount Vesuvius, helium is the second-most abundant element in the universe. The second element on the Periodic ...