A safe surgery checklist, including questions such as “Do we have the right patient?” and “What operation are we performing?”, has been proven to reduce deaths by more than 40%.

Tommy Tucker was a squirrel who became a celebrity in the U.S., touring the country wearing women’s fashions while performing tricks and selling war bonds during WW2.

Ants keep slaves. Certain species, the so-called sanguinary ants in particular, raid the nests of other ant tribes, kill the queen, and kidnap many of the workers. The workers are brought back to the captors’ hive, where they are coerced into performing menial tasks.