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Looking Up: The Air (And Water) Up There

Astronaut Karen Nyberg looks at Earth through a cupola on the ISS.
Astronaut Karen Nyberg looks at Earth through a cupola on the ISS.

As we continue our celebration of Women's History Month, we welcome Valerie Ryder, a toxicology specialist at NASA's Johnson Space Center. She talks about the life of a toxicologist and the work she does to ensure air and water safety on the International Space Station.

Dean also answers a kid's question about how old we'd be on other planets.

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