Stock Photo - ESA (European Space Agency) astronaut Thomas Pesquet (left) and Russian cosmonaut Sergey Ryzhikov (right) are seen operating hardware for the European MARES experiment inside the Columbus module aboard the International Space Station. MARES is an ongoing investigation into the effects of microgravity on the human muscular system.

Stock Photo: ESA (European Space Agency) astronaut Thomas Pesquet (left) and Russian cosmonaut Sergey Ryzhikov (right) are seen operating hardware for the European MARES.

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