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How heavy can an element be? Ancient stars were capable of producing elements heavier than any element on the periodic table found naturally on Earth.

Researchers have put a number on how heavy an atom nature can produce—and it happens under extreme conditions in specific types of stars and supernovae.

An analysis of 42 ancient stars in the Milky Way reveals the first hints of nuclear fission in the cosmos, hinting at the existence of elements far heavier than anything found naturally on Earth.

For the first time, scientists have discovered nuclear fission occurring amongst the stars, supporting the idea that neutron stars create "superheavy" elements when they collide, which then break down via nuclear fission to birth rare elements. Space.com reports: Nuclear fission is basically the op...

Heavy elements like gold and silver are believed to be created when neutron stars collide, but new research suggests these collisions may also spur nuclear fission reactions.