Ever casually browse around antique shops and flea markets on the weekend?
Ever wonder if you're getting radiated with some of the antiques?
Most folks have heard about the radioactive properties of some old Fiestaware, which used uranium for that pretty red-orange glow, or how Vaseline glass glows under a UV light. But there are other old antiques that give you more radiation than several chest x-rays.
Slate has an article on finding radioactive antiques on ebay.