Nasa researchers observed freshwater snails reproducing in space during a Shuttle mission. Their gravity-sensing organs, called statoconia, grew substantially larger in microgravity. Swordtail fish larvae also developed enlarged otoliths, which are similar gravity-sensing stones. This indicated a critical developmental period where altered gravity impacts stone size. The findings suggest these organs regulate to achieve a functional weight.from Science News: Fresh Discoveries, Research & Breakthroughs https://ift.tt/KrbBk1Y
Five geckos flew on a 16-day space mission without food or water. This experiment tested reptiles as models for microgravity research. Laboratory analysis revealed changes in bone density and liver cell activity. Researchers attributed these changes to housing and lack of provisions. Geckos' specialized toe pads helped them adhere in weightlessness.