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Citing "capital scarcity" the Geron Corporation said it will abandon its research into using human embryonic stem cells to treat spinal cord injuries. Stem cell expert Leonard Zon discusses the announcement and what it means for the future of embryonic stem cell research.

For years, a theory has held that Earth's large moon played a critical role in stabilizing the planet's tilt, damping down differences between the seasons. Now, astronomer Jason Barnes says that life on our planet would endure even without a moon, a finding that might increase the number of potentially habitable planets in our galaxy.

Republicans said it's time for the federal government to follow the lead of 49 states. Democrats said the amendment would tie future lawmakers' hands. To move forward, the amendment needed a two-thirds majority — 290 votes. The vote was 261-165.

Paterno's son said doctors are optimistic about his father's recovery.

Ultralight metallic microlattice is one hundred times lighter than styrofoam and it can sit atop a delicate dandelion without crushing the fuzzy seeds.

The lead singer of Aventura, the hottest band on the Latin charts, has a solo album and a TV show.

The U.S. government operation airlifted more than 14,000 Cuban children from Havana to the U.S. after Fidel Castro took control of Cuba. Fifty years later, those children are recalling how that flight changed their lives.

The European debt crisis has driven politicians in Italy and Greece to turn to technocrats for leadership. What exactly is a technocrat? Will they be the silver bullets needed to help lift Europe out of its economic quagmire? Guest host Linda Wertheimer gets some answers from political scientists.

Outraged after seeing campus police use pepper spray on protesters who were sitting down, hundreds showed their disdain. They stood by silently as the school's chancellor walked to her SUV. The moments are on video.

Afghan leaders have wrapped up their latest grand assembly, known as a loya jirga, where delegates from all over Afghanistan discussed topics key to the country's future. Among the issues they discussed was the level of U.S. involvement after the 2014 drawdown. Host Audie Cornish talks with Alissa Rubin of The New York Times for more.