Antihydrogen

https://www.youtube.com/watch?v=4W9Fr5lO__k https://www.youtube.com/watch?v=wYSUchAnQfo https://www.youtube.com/watch?v=DRieNGDMxPM http://www.nature.com/news/ephemeral-antimatter-atoms-pinned-down-in-milestone-laser-test-1.21193 https://home.cern/about/updates/2016/12/alpha-observes-light-spectrum-antimatter-first-time http://newscenter.lbl.gov/2012/03/07/measure-antiatom/