kg of anti-matter explodes with the force of up to 43 million tons of TNT - as though several thousand Hiroshima bombs were detonated at once.So how can anti-matter be stored? Space seems the only place, both for storage and for large-scale production. On Earth, gravity will sooner or later pull any anti-matter into disastrous contact with matter. Anti-matter has the opposite effect of gravity on it, the anti-matter is 'pushed away' by the gravitational force due to its opposite nature to that of matter. A way around the gravity problem appears at CERN, where fast moving anti-protons can be held in a 'storage ring' around which they constantly move - and kept away from the walls of the vacuum chamber - by magnetic fields. However, this only works for charged particles, it does not work for anti-neutrons, for example.The Unanswerable QuestionThough anti-matter can be manufactured, slowly, natural anti-matter has never been found. In theory, we should expect equal amounts of matter and anti-matter to be formed at the beginning of the universe - perhaps some far off galaxies are the made of anti-matter that somehow became separated from matter long ago. A problem with the theory is that cosmic rays that reach Earth from far-off parts are often made up of protons or even nuclei, never of anti-protons or antinuclei. There may be no natural anti-matter anywhere.In that case, what happened to it? The most obvious answer is that, as predicted by theory, all the matter and anti-matter underwent mutual annihilation in the first seconds of creation; but why there do we still have matter? It seems unlikely that more matter than anti-matter should be formed. In this scenario, the matter would have to exceed the anti-matter by one part in 1000 million.An alternative theory is produced by the physicist M. Goldhaber in 1956, is that the universe divided into two parts after its formation - the universe that we live in, and an alternate universe of ant...
