Actor Alan Alda, shown here in 2016, says he has been diagnosed with Parkinson's disease. Evan Agostini/Evan Agostini/Invision/AP hide caption
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Alan Alda
Alan Alda Jhon Ochoa, Photo-illustration: Renee Klahr/NPR hide caption
A Greenpeace protest in 2010 juxtaposes the drowning of some of the world's most iconic structures with Cancun, Mexico's, rising skyline. Juan Barreto/AFP/Getty Images hide caption