A Tragic Death — But Also a Lasting Legacy: New Knowledge About Humankind's Impact on the Home Planet

Yesterday, I got the sad news that Alberto Behar, a scientist with NASA’s Jet Propulsion Laboratory, had died in a plane crash in Pasadena, Calif.

Today, we learned anew how much of a contribution he made to understanding of humankind’s impact on our planet. Thanks in large measure to the robotic craft and instruments Behar designed, scientists have shown that summertime meltwater rivers atop the Greenland Ice Sheet are contributing directly — and significantly — to global sea level rise.

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