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IRA FLATOW, HOST:

The world's tallest peak. It's so iconic. It's so classic. You'd think we'd have learned everything there is to know about it by now, but you'd be wrong. Scientists still can't even agree on the exact height of the mountain. And what's more, they're not even sure what kind of rocks the mountaintop is made of.

Estimated altitude for this flight was about 115,000 feet, says Raul Oaida, 18-years-old. Raul launched the shuttle, along with a video camera and a GPS tracker, by way of a large helium balloon. Flight time was about three hours--the shuttle landing about 150 miles south of where it took off.

Astrophysicist Adam Riess shared the Nobel Prize in Physics in 2011 for his work on distant supernovae, which demonstrated that the universe was not only expanding--but that its expansion was accelerating. Now he's hunting for clues that might explain why, and one of the prime suspects is a mysterious force known as dark energy.

Have pity on these poor fruit flies.

Researchers made a bunch of male fruit flies into boozehounds by pushing them on females unreceptive to their advances.

After a few days of striking out, the male losers, referred to as the "rejected-isolated" group in a study published online by Science, drowned their sorrows in alcohol.

Some of the documents seized last May after U.S. Navy SEALs killed Osama bin Laden at his compound in Pakistan show that the al-Qaida leader "boldly commanded his network to organize special cells in Afghanistan and Pakistan to attack the aircraft of President Barack Obama and Gen.

Dharun Ravi, the former Rutgers University student "accused of using a webcam to spy on his gay roommate's love life has been convicted of bias intimidation and invasion of privacy in a case that exploded into the headlines when the victim of the snooping committed suicide" in September, 2010, The Associated Press writes.

The 20-year-old "could face 10 years in prison when he's sentenced," the AP adds.

Is the battle for the GOP presidential nomination about history? Or is it about math? Santorum may be getting big headlines with his primary wins, but it's Romney who is advancing further to the magic 1,144 number. And more defeats mean more pressure on Gingrich to pull out. Plus: a tribute to the late Peter Bergman of Firesign Theater. NPR's Ron Elving and Ken Rudin have the latest in this week's political roundup.

The Oscar-winning actor George Clooney was arrested this morning, after he and supporters, including congressmen stepped onto the grounds of the Sudanese embassy in Washington D.C.

The Washington Post reports: