Big Ideas : Spaceflight Can Reverse Blood Flow in Astronauts

In a startling discovery, a NASA study found that long-duration space travel can reverse the blood flow or even make it stagnant in astronauts' upper bodies. Plus, these amphibians with remarkable regenerative abilities can teach scientists how to heal the human body. And, alien genes from bacteria helped plants conquer the land.

Big Ideas : Spaceflight Can Reverse Blood Flow in Astronauts