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Scientists have measured all kinds of athletes, and one sport consistently come out on top for maximizing the body's ability to convert oxygen to energy.

Foreign ministers from the world's top economies are meeting for the G20 in South Africa. But the U.S. is conspicuous in its absence.

Imagine racing over a frozen lake on a wind-powered sled, hitting speeds that top 40 miles an hour. That's what ice sailors all around the world do just about anywhere water freezes. In the U.S., Lake Champlain has emerged as one of the country's best ice sailing venues.

One man said he and his family retreated to the attic of his home because the water had reached the top of the door frame.

Miss USA beauty pageant contestant, Sheena Monnin of Pennsylvania, says the contest was rigged and that she has left the organization because of its immoral behavior. The Miss USA pageant says Monnin has changed her story, and that she first quit because she opposed transgender contestants.

Google Rick Santorum's name and one of the top results is a scatological and sexual site called SpreadingSantorum.com. The site is an online prank, staged in 2003 by gay-rights activist Dan Savage to redefine the former senator's name, that has endured thanks to the power of Google's algorithm.

The Munich Security conference kicked off Friday. Vice President Kamala Harris, European leaders and China's top diplomat are in attendance. Top of the agenda is the war in Ukraine.

President Obama's top counterterrorism adviser recently floated a plan to empty Guantanamo's detention camps and relocate "enemy combatants." The president promised in 2009 to shut down the facility.

A new University of Southern California report pinpoints areas that need improvement — as well as a few small wins.

How do skyscrapers withstand 100-mph winds? How does air circulate inside tall buildings? And what happens when you flush a toilet on the 100th floor? Those questions and more are answered by Kate Ascher in her new book exploring the inner workings of skyscrapers.