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"
"Mr. Spock succumbs to a powerful mating urge and nearly kills Captain Kirk."
-- TV Guide, describing the Star Trek episode _Amok_Time_