A spacecraft or satellite that carries living organisms or biological experiments into space to study how life responds to space conditions.
From bio- (life) + satellite (a man-made object orbiting Earth), combining biology with aerospace terminology. The term emerged during the space race era when NASA and Soviet scientists launched living creatures into orbit.
The first biosatellites carried dogs, monkeys, and plants into space—their missions proved that living things could survive in orbit, paving the way for human spaceflight!
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