Physicists at the Fermi National Accelerator Laboratory in Illinois report that they have discovered a new clue that sheds light on one of the biggest mysteries of cosmology: Why the universe is composed of matter and not its opposite, antimatter. If confirmed, the finding portends fundamental discoveries at the new Large Hadron Collider on the border of Switzerland and France. as well as a possible explanation for our own existence.
In a mathematically perfect universe, we would never have existed. According to the basic precepts of Einsteinian relativity and quantum mechanics, equal amounts of matter and antimatter should have been created in the Big Bang and then immediately annihilated each other in a blaze of energy, leaving nothing behind with which to make stars, galaxies and us. And yet the universe as we know it, with its infinite variety, exists, and physicists want to know why.