Uh, NO. Obviously antimatter doesn't move backward in time. The point is that the fundamental laws of nature appear time reversable at the micro-scale -- you can "play a movie" of the "scattering" ...
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How does the universe make antimatter?
Our universe is filled with particles, such as electrons and protons, which make up all the stuff on our planet and beyond: animals, plants, people, planets, asteroids, stars, gas clouds, and galaxies ...
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