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NASA astronaut Megan McArthur called the situation "sub-optimal," but says the crew's four astronauts are "prepared to deal with it." They will return home after spending nearly 200 days in space.
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That's a problem in Bangladesh, where pit latrines have brought rates of open defecation down — but led to the dumping of 'fecal sludge' in waterways. A new study proposes a possible solution.