π Fish in space: medaka prove they can reproduce in zero-G
Four medaka fish were sent into space during the STS-65 mission aboard the Space Shuttle Columbia in July 1994. These fish, along with Japanese astronaut Chiaki Mukai, spent 15 days orbiting Earth for the experiment. Researchers successfully identified 43 eggs, and eight baby fish hatched while still in space. This made the medaka the first vertebrates known to lay eggs in microgravity conditions. The 'space medaka' later proved they could swim normally upon returning to Earth. π