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<DIV>From <A
href="http://science.slashdot.org/article.pl?sid=03/12/05/1320234&mode=thread&tid=126">Slashdot</A>:
According to <A
href="http://www.economist.com/science/displayStory.cfm?story_id=2265877">this
Economist article</A> scientists at CERN are using beams of antimatter to
destroy cancer cells. The basic idea is that you make some anti-protons, whizz
them round in a accelerator to get them moving at a decent rate then fire them
at living tissue. They burrow down to the desired depth, find a friendly proton
and do a spot of mutual anihilation, releasing sufficient energy in the process
to kill a cell or two. The trick is that matter/anti-matter anihilation is a bit
like nuclear fission, it does not work if the particles are moving too fast. The
anti-proton has to be moving slowly enough to get pulled into the orbit of some
atomic nucleus and actually collide. This allows the treatment to be fine tuned
so it only affects the tissues at a very specific depth - unlike traditional
therapies which zap everything in the line of fire.</DIV></BODY></HTML>