Fee, Fi, Fo, Fum, and Phooey

Fee, Fi, Fo, Fum, and Phooey were five mice who orbited the Moon a record 75 times on the 1972 Apollo 17 mission.

The mice were part of the Biological Cosmic Ray Experiment (BIOCORE), a study designed to measure whether cosmic radiation would damage living tissue during spaceflight. NASA gave them identification numbers A3305, A3326, A3352, A3356, and A3400, and their nicknames were given by the Apollo 17 crew (Eugene Cernan, Harrison Schmitt, and Ronald Evans). The four male mice, one female mouse, and Evans orbited the Moon for a record-setting six days and four hours in the Apollo command moduleAmerica as Cernan and Schmitt performed the Apollo program's last lunar excursions.

One male mouse, A-3352, died during the trip, and the four survivors were euthanized and dissected for their expected biological information upon their return from Moon orbit. After recovery, researchers examined the surviving mice's ears, brains, organs, and other tissues to look for possible changes caused by radiation exposure or other flight conditions.

The mice and the three astronauts were the last living beings to orbit the Moon, and the last to leave low Earth orbit until the Artemis II lunar flyby in April of 2026. Evans and the mice share two living-being spaceflight records: the longest amount of time spent in lunar orbit (147 hours 43 minutes), and the most lunar orbits completed (75).