People were once intentionally infected with malaria to cure syphilis. The fever killed the bacteria, and then doctors cured the malaria. The man who proposed the idea won a Nobel Prize.
A 19-year-old bladesmith forged a knife using metal from a 4.5-billion-year-old meteorite, then decorated it with 24-karat gold, opals and a 20,000-year-old mammoth tooth.