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Piers Sellers: The Astronaut Who Wanted to Save the Earth

Sellers was dedicated to drawing attention to our planet’s changing climate and seeking technical solutions to limit humanity’s impact.

Published On 04/21/2017
7:00 AM EDT
Astronaut Piers Sellers during the third spacewalk of STS-121, a demonstration of orbiter heat shield repair techniques. | Astronaut Michael Edward Fossum/NASA
NASA's Goddard Space Flight Center/Rebecca Roth
Leonardo DiCaprio visited NASA’s Goddard Space Flight Center in April 2016 to interview Piers Sellers for his climate change documentary 'Before the Flood'. | NASA/Goddard/Rebecca Roth