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The Centennial Ride to Wounded Knee, December 29, 1990. Photograph by James Cook

Photograph Captures the Centennial Ride to Wounded Knee

On December 29, 1990, photographer James Cook caught sight in the distance of more than 350 horseback riders who were recreating the ride to Wounded Knee

The iconic Graflex Speed Graphic was used by photojournalists from the 1930s to the late 1950s.

What’s Up

"If we don't do something," says Knowlton, who has earned the nickname Dr. Doom, "we could lose all corals by 2050."

A Coral Reef’s Mass Spawning

Understanding how corals reproduce is critical to their survival; Smithsonian’s Nancy Knowlton investigates the annual event

"Bittersweet Harvest," a Smithsonian exhibit about braceros (California, 1956), fits neatly into the new strategy.

Our Plan

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