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Labor Day Weekend for Astronauts: Space Toilet Cleaning and Exercise

Labor Day Weekend for Astronauts: Space Toilet Cleaning and Exercise
American astronauts Doug Wheelock, Tracy Caldwell Dyson (center) and Shannon Walker, all NASA spaceflyers and Expedition 24 flight engineers, pose for a photo with an American flag while aboard the International Space Station during their summer 2010 mission. (Image credit: NASA)

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Mike Wall
Mike Wall

Michael Wall is a Senior Space Writer with Space.com (opens in new tab) and joined the team in 2010. He primarily covers exoplanets, spaceflight and military space, but has been known to dabble in the space art beat. His book about the search for alien life, "Out There," was published on Nov. 13, 2018. Before becoming a science writer, Michael worked as a herpetologist and wildlife biologist. He has a Ph.D. in evolutionary biology from the University of Sydney, Australia, a bachelor's degree from the University of Arizona, and a graduate certificate in science writing from the University of California, Santa Cruz. To find out what his latest project is, you can follow Michael on Twitter.