I've heard of people who got in trouble with their landlords for holding loud parties or violating the no-pets clause in their leases, but a 31-year-old Swedish guy named Richard Handl may be the first apartment dweller in history to have problems because he tried to build a nuclear reactor in his kitchen. According to Handl's blog, Richard's Reactor, he began a project to build a breeder reactor and produce small amounts of fissionable uranium 233 and plutonium 239 "just for fun and to see if it's possible to split atoms at home."
