Yerosha vs Bion

Yerosha was a rhesus macaque used in the Soviet Union's Bion space-biomedical research program. Together with another macaque named Dryoma, he flew aboard Bion 8 from September 29 to October 12, 1987, while experiments examined how living organisms responded to orbital flight. The mission formed part of a broader series of Soviet biosatellite studies involving animals, plants, cells, and other bio...

Bion was a Soviet rhesus macaque who flew aboard the Kosmos 1514 satellite as part of the Bion 6 mission in 1983. Alongside another macaque named Abrek, Bion was launched into space to study physiological changes during spaceflight. The mission marked the beginning of the Soviet Union's Bion satellite primate program, aiming to understand how complex organisms might react to prolonged periods in m...