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" ...

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 ...

One of the most fundamental and curious mysteries in the universe is the fact that anything exists at all. That is because during the Big Bang, equal amounts of matter and antimatter particles should ...