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Tornado Classified at Top of Scale; NBA Star Durant Pledges $1 Million

Homes, trees and automobiles damaged by Monday's tornado are seen by early morning light in Moore, Okla., on Tuesday. Photo by Steve Sisney, The Oklahoman / NewsOK.com President Obama declared a major disaster in Oklahoma Tuesday and has ordered federal...
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Video: Down in the Salinas Valley

As the debate over immigration reform continues in Washington D.C., Need to Know offers an inside look at the lives of Latino farm workers.

The Dirt: This Week in Nature

New World Record for Atmospheric Carbon Dioxide. Some world records provide a reason to celebrate. Not this one. It is estimated that in the late eighteenth century, carbon dioxide levels in the air would have been about 280 ppm (parts per million). Hawaii’s Mauna Loa Observatory has been measuring atmospheric carbon dioxide levels since 1958. The [...]

Manhunt—Boston Bombers

Which technologies worked—and which didn't—in the race to track down the men behind the marathon attack?
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“Stuck” and Why We Shouldn’t Discount Documentaries Used Primarily as Tools for Change

Tom Roston spots a tour bus for a new documentary (a tour bus!) and questions why documentaries held in high regard have to be about "storytelling" and "cinema."