When humans, animals, and machines move throughout the world, they always push against something, whether it’s the ground, air, or water. Until recently, physicists believed this to be a constant, following the law of conservation momentum. Now, researchers from the Georgia Institute of Technology have proven the opposite — when bodies exist in curved spaces, it turns out that they can in fact move without pushing against something.
The findings were published in Proceedings of the National Academy of Sciences on July 28, 2022...
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