Fabien Cousteau sits inside Aquarius Reef Base in 2012. If he is able to remain under water for 31 days, he will have lasted one day longer than his grandfather, Jacques Cousteau. Mark Widick/AP hide caption

itoggle caption Mark Widick/AP

Contestants compete in a rock-paper-scissors tournament in Gainesville, Fla., in 2012. A new study indicates it's not as random as it seems. Matt Stamey/Gainesville Sun/Landov hide caption

itoggle caption Matt Stamey/Gainesville Sun/Landov

A worker holds a white rodent at the State Key Laboratory of Biotherapy in Chengdu, China. Researchers at McGill University in Montreal found that mice left alone with a man had increased levels of the hormone corticosterone. China Photos/Getty Images hide caption

itoggle caption China Photos/Getty Images

Made for a tight grip: The female penis of an insect species newly discovered in Brazil has spines on it. Courtesy of Current Biology, Yoshizawa et al. hide caption

itoggle caption Courtesy of Current Biology, Yoshizawa et al.

The fossilized remains of a whale that washed up on a shore in what's now Chile more than 5 million years ago. Vince Rossi/Smithsonian Institution hide caption

itoggle caption Vince Rossi/Smithsonian Institution

A view of Venus, black dot at top center, passing in front of the sun during a transit in 2012. A quarter of Americans questioned failed to answer correctly the most basic questions on astronomy. AP hide caption

itoggle caption AP

The National Ignition Facility's 192 laser beams focus onto a tiny target. LLNL hide caption

itoggle caption LLNL

A fish that knows the way to go: the Chinook salmon, which appears to use the Earth's magnetic field to navigate ocean waters and rivers. Jeff T. Green/Getty Images hide caption

itoggle caption Jeff T. Green/Getty Images

The Chinese flag is seen in front of a view of the moon at Beijing's Tiananmen Square in December, when China's first moon rover touched the lunar surface. That feat was widely celebrated — but observers believe the rover has now run into serious trouble. Mark Ralston/AFP/Getty Images hide caption

itoggle caption Mark Ralston/AFP/Getty Images

This composite image shows new details of the aftermath of a massive star that exploded and was visible from Earth over 1,000 years ago. Chandra X-ray Observatory Center/NASA hide caption

itoggle caption Chandra X-ray Observatory Center/NASA