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Ecologist and "natural security expert" Rafe Sagarin thinks our systems for dealing with natural disasters and terrorist attacks need to be updated. The best place to turn for advice? Other organisms.

For Facebook to live up to its valuation, the company will need to redefine advertising as we know it.

The Obama campaign on Wednesday escalated its attack on Mitt Romney's business career, with Vice President Joe Biden scheduled to aggressively question how Romney's management of the private equity firm Bain Capital might translate into running the U.S. economy.

The Mitt Romney campaign has a sequel to its "Day One" ad, in which it explains what else the presumptive GOP nominee would include in his immediate to-do list if inaugurated president. Candidates often use the "first day" promise to highlight priorities. But Washington politics can change things.

Cherry Valley train fire final report issuedWest Nile virus shows up early this yearNATO protestors will challenge terrorism chargesIs more gambling a…

Mourners left more than 600 pairs of sneakers at the site, shoes that held deeply personal meanings for runners before the race.

The list of people who aren't accounted for has continued to shrink since early reports that nearly 200 people were missing after the mudslide. Officials have raised the death toll to 18 people.

The ousted Ukrainian president says Moscow's annexation of the Black Sea peninsula is "a major tragedy," and he hopes to persuade Russian President Vladimir Putin to return it.

Trinity Groves, a 15-acre restaurant incubator, brought Chinese-Latin food and economic vitality back to West Dallas. What was once a dangerous neighborhood is now a hot spot for international eats.

In the second of three talks with valedictorians across the country, we hear from Leilanie Martinez of South Gate High School in Calif.