FASTER, PLEASE: Stem Cells Grown in Space Turn Out to Have a Surprise Advantage. “Stem cells are special in the way they can keep on replicating, and turn themselves into many other types of cell. Now scientists have discovered how their superpowers get a remarkable boost when they’re grown in space. The microgravity environment increases some of the regenerative capacities of stem cells even further, researchers from the Mayo Clinic in Florida have found, based on experiments carried out on the International Space Station (ISS).”