Piers Sellers, Space Shuttle Astronaut and NASA Climate Scientist, Dies at 61

Piers Sellers, a British-American climate scientist and former NASA astronaut who launched on three space shuttle missions to the International Space Station, died on Friday (Dec. 23). In the column, Sellers wrote about how his prognosis added a sense of urgency to his work on climate change. "I was forced to decide how to spend my remaining time," Sellers explained in the editorial.