Stock Photo - EARTH Aboard the International Space Station -- 06 Jun 2009 -- Canadian Space Agency astronaut Robert Thirsk - Expedition 20 flight engineer - performs an insertion of urine samples into the Minus Eighty Degree Laboratory Freezer for ISS (MELFI) as part of the Nutritional Status Assessment (NUTRITION) study in the Japanese Kibo laboratory of the International Space Station -- Picture by Lightroom Photos / NASA.

Stock Photo: EARTH Aboard the International Space Station -- 06 Jun 2009 -- Canadian Space Agency astronaut Robert Thirsk - Expedition 20 flight engineer - performs an.