CERN, the world’s largest particle accelerator, had confirmed that antimatter falls down with gravity — just like everything else.
Antimatter is the enigmatic twin of ordinary matter, possessing the same mass but with an opposite electrical charge.
Almost all subatomic particles, such as electrons and protons, have an anti matter counterpart.
While electrons are negatively charged, antielectrons are positively charged.
Likewise, while protons are positively charged, antiprotons are negatively charged.
Einstein's general theory of relativity, predicts that all masses, irrespective of differences in their internal structures, react to gravity in a similar manner.