Peter Engels
Peter Engels

It was another great year for science, particularly physics.

A team of physicists at Washington State University, led by professor Peter Engels, announced that they had created “negative mass,” which, as they noted, behaved in surprising ways, such as accelerating backwards when pushed from a forward direction—it was created by using lasers to cool rubidium atoms to just above absolute zero and could be used to study challenging questions related to the cosmos.

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Phys.org