Photo of the Day

Scientists collecting samples from a giant redwood tree
May 26, 2012

Redwood Tree, California

This Month in Photo of the Day: Adventure and Exploration Photos

Partway up a 350-foot tree, botanist Marie Antoine (at right) passes a slender core sample of its wood—750 years of redwood biography—to canopy ecologist Giacomo Renzullo. Research now shows that the older such trees get, the more wood they put on.

See more pictures from the October 2009 feature story, "The Super Trees."

Learn more about the Redwood Transect project »

Photograph by Michael Nichols, National Geographic

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