Can saguaros forecast the weather?

Saguaros are the sentinels of the desert, with a life span more than 150 years and heights that can reach over 50 feet. Yet little is understood about how the saguaro will survive and adapt as our climate gets hotter and drier. Meteorologist Royal Norman talked with an saguaro expert, Don Swann, a biologist at the Saguaro National Park in Tucson.

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