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The WikiLeaks founder has asked for asylum in Ecuador, trying to avoid extradition to Sweden.

From a GPS that outsmarts traffic jams to flooring that generates electricity from footsteps, student inventors are dreaming up a more convenient, energy efficient future. Ira Flatow talks with winners of Microsoft's "Imagine Cup" and Siemens' "We Can Change The World Challenge" about their innovations.

Reports from the National Research Council and the U.S. Geological Survey say that sea levels on both coasts of the United States are rising at an accelerating rate. Oceanographer Peter Howd talks about what's pushing up the oceans, and which coastal hotspots may drown first.

Mississippi's only clinic that performs abortions is facing possible closure. A new state law requires doctors to have admitting privileges at local hospitals by July 1. But doctors at the Jackson Women's Health Organization have not yet been accepted. The clinic is now suing to stop the law, arguing it amounts to an unconstitutional ban on abortions.

Back when President Obama was urging Congress to pass his health care law, he rejected claims that the penalty for not obtaining insurance would amount to a tax. On Thursday, Chief Justice John Roberts begged to differ — while using the tax classification to save the law. And Republicans pounced.

The Border Patrol recently began training wild mustangs to help out along the border in southern Arizona. Horse patrols are nothing new; they allow agents to get into remote areas no vehicle can reach. But it turns out the mustangs are exceptionally well-suited for the harsh landscape.

President Obama visited Colorado Springs on Friday to survey the damage caused by the Waldo Canyon fire, which burned more than 300 homes.

Many medical professionals are glad people won't lose coverage provided by the Affordable Care Act. Still, they worry about whether there will be enough physicians to treat increased patient loads — and who will ultimately pay the bill.

Tests that take hours instead of days can help doctors make a better diagnosis of infectious diseases. The results can help them decide which antibiotic to use, and which one to keep in reserve.

Tea Party activists say the Supreme Court decision upholding the Affordable Care Act will inspire passion in many conservative circles ahead of the November presidential election.