Scroll Tiered News Today

Seen in space flight. spend a long time off the planet and your bones thin. this puts astronauts at a greater risk. nasa says knowing this is crucial if ever going to mars or deep space. how will we know if being in space is cause of kellys body changes? nasa has the perfect specimen to compare him to. his twin brother, retired as astronaut mark kelly. he has scroll tiered for the study. he will be getting poked and prodded by researchers here while scott makes history in orbit. kelly wont be al...