EmperorOfCanada writes: "A 15 year old girl has invented a very cheap and easy way to build your own cloud diffusion chamber; which is a neat way to see various radiation particles leave trails. Radiation such as cosmic rays, background radiation, and any handy radiation sources such as a disassembled smoke detector. Video"
"Every morning, I get up and look through the 'Forbes' list of the
richest people in America. If I'm not there, I go to work"
-- Robert Orben