It is. the create it in very small amounts using supercolliders. I've most often heard this in relation to the Cern collider in Switzerland

Dawn

Thanx......i just started reading Angels And Demons..Its amazing the stuff they have created.....

Anti-matter is a lot more common than that prodcued in CERN. Gamma rays hitting the Earth's upper atmosphere create them. Radio active products produce them. They are produced in the sun. They are everywhere. You don't notice them because soon after their creation they run into normal matter and anihilate and produce some other form of radiation.

As an example, one form of nuclear decay involves a proton emitting a positron and itself becoming a neutron. A positron is an anti-electron. The moment the positron leaves the atom's nucleus, it will bump into the nearest electron. These two antiparticles (electron and poistron or anti-electron) will cease to exist but their energy will be converted into electromagnetic energy.