The U.S. spacecraft Mercury-Atlas 5 is launched with Enos, a chimpanzee, aboard (the spacecraft orbited the Earth twice and splashed-down off the coast of Puerto Rico).

• 1961年，美国宇宙飞船水星－宇宙神5号载着一只叫以挪士的黑猩猩发射升空（飞船绕地球轨道飞行了2周后落入波多黎各海岸的水中）。