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"
"Don't worry about people stealing your ideas. If your ideas are any good,
you'll have to ram them down people's throats."
-- Howard Aiken