Lawrence Livermore National Labs scientists have created the largest number yet of anti-matter positrons (anti-electrons), using a short-pulse laser to accelerate electrons through a gold target.

“By creating this much anti-matter, we can study in more detail whether anti-matter really is just like matter, and perhaps gain more clues as to why the universe we see has more matter than anti-matter,” said Peter Beiersdorfer, a lead Livermore physicist.

Source: Lawrence Livermore National Laboratory news release