In 1994, 300 young male fruit flies flew for 14.5 days on IML-2; repeated video showed their locomotor activity rose sharply while they were in microgravity

In 1994, fruit flies were launched into space, revealing significantly heightened activity levels in microgravity. These flies aged more rapidly than their Earth-dwelling counterparts. Researchers noted a decrease in mitochondrial RNA, hinting at a connection to energy production at the cellular level. Simulated weightlessness experiments confirmed the increased activity observed in space. This foundational research is vital for understanding the implications of prolonged weightlessness on future space missions.