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"
All this wheeling and dealing around, why, it isn't for money, it's for fun.
Money's just the way we keep score.
-- Henry Tyroon