And, 'At the Big Bang, matter and antimatter should have been produced in equal amounts. However, we know that our world is made up of matter: antimatter seems to have disappeared. To find out what has happened to it, scientists employ a range of methods to investigate whether a tiny difference in the properties of matter and antimatter could point towards an explanation.'
Further: 'One of these methods is to take one of the best-known systems in physics, the hydrogen atom, which is made of one proton and one electron, and check whether its antimatter counterpart, antihydrogen, consisting of an antiproton and a positron, behaves in the same way. CERN is the only laboratory in the world with a dedicated low-energy antiproton facility where this research can be carried out.'
Another good story for further information on this story comes from the National Geographic News: 'Antimatter Atoms Trapped for First Time'”"A Big Deal"
The article states, 'This is the next step, and it's a key next step toward solving that central mystery', which is explained as: 'Yet for all the similarities, scientists think matter and antimatter must differ in some other fundamental way. That's because, even though matter and antimatter should have been created in equal amounts during the big bang, the universe we know is made almost entirely of matter.'