An illustration shows trapped ytterbium atoms cooled to temperatures about 3 billion times colder than deep space

Scientists create the coldest matter in the universe in a lab

A team of researchers has cooled matter to less than a billionth of a degree from absolute zero, colder than even the deepest depths of space, far from any star. Interstellar space never gets that cold due to the fact that it is evenly filled with cosmic microwave background (CMB), a form of radiation left …

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