Ham the Chimp in his capsule

"Ham tries out his combination couch and life support system in preparation for his flight in Mercury Redstone-2 (MR-2)," says NASA in its official caption. "The couch is plugged into the circuit that normally would supply the astronaut's full pressure suit. The MR-2 flight was one in a series of flights that led to the manned orbital flights of NASA's Project Mercury program." Photo courtesy of NASA.

See our biography of Ham the Chimp