What is antimatter and why does it matter?

The place is England. The year is 1928. One of the founding theorists of quantum mechanics, Paul Dirac, is scratching his head because solutions to his equations have yielded unexpected results. For the solutions to make sense, he reasons, there must be a particle that has the mass of an electron but the opposite charge. At the time, such a thing was not known to exist.

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<p><a href="http://www.physorg.com/news6709.html">What is antimatter and why does it matter?</a></p> <p>The place is England. The year is 1928. One of the founding theorists of quantum mechanics, Paul Dirac, is scratching his head because solutions to his equations have yielded unexpected results. For the solutions to make sense, he reasons, there must be a particle that has the mass of an electron but the opposite charge. At the time, such a thing was not known to exist.</p>