In a first of its kind experiment, physicists from Washington State University have created the only known matter in the world with “negative mass.” Unlike every other physical object in the world we are familiar with, this mass accelerates backward under pressure.
This phenomenon, known as the intuitive side of Newton’s Second Law of Motion (force is equal to the mass of an object times its acceleration (F=ma)) — could possibly explain some of the more bizarre phenomenon in space, like black holes, but also, backward time travel.
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