So that must be why life on Mars died out!

"I drank what?!?" - Socrates

City officials in the small town of Aliso Viejo, California became alarmed when they stumbled across an environmental website warning of the dangers of "dihydrogen monoxide". Described as "an odorless, tasteless chemical" that can be deadly if accidentally inhaled, they considered voting to ban styrofoam cups when the website went on to explain that the chemical was used in their manufacturing process.

Only later did they learn that the website is a prank, and that "dihydrogen monoxide" has a much more familiar name that even you non-Chem majors might have heard of: Water, or H2O.