NASA astronaut Peggy Whitson posted this image to her Twitter account (on Tw: AstroPeggy) of her storing blood samples in the International Space Station's ultra-cold freezer for eventual return to Earth. In early September, Whitson returns to Earth after spending more than nine months aboard the orbiting laboratory, and breaking a number of records in space. Amazing work, amazing people, just another day living in space aboard ISS! Credit: NASA #nasa #astronauts #astropeggy #science #technology #livinginspace #spacestation #iss