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The goal, XPrize says, is to tackle "the biggest threat facing humanity — fighting climate change and rebalancing Earth's carbon cycle. "

Many spiders ply the skies by riding "balloons" of silk. And they rely on something more than just the wind to take them high up and far away.

Scientists have found a new way to analyze the structural integrity of ice shelves at the end of the world, through the songs the winds sing on top of them.

A math teacher ousted one of Kentucky's top Republicans in a primary race. Forty-one current and former teachers were on the ballot and this is just one state where educators are running for office.

Capt. William Howard Hughes Jr. had top-secret clearance and disappeared in 1983. His family was baffled, and some people speculated he'd defected to the Soviet Union.

Fallout from the USA Gymnastics sexual abuse scandal continued with another grilling in Congress. Former top leaders of the sport and from Michigan State University answered tough questions.

The populist ex-mayor of London, a vocal proponent of the Brexit, was considered a top candidate to replace David Cameron as prime minister. Then one of Johnson's allies announced his candidacy.

Gummi and Kiddi are two sheep-herding brothers who've spent a lifetime butting heads near the top of the world. When a disease threatens their flocks, they must overcome decades of estrangement.

Former New York City Mayor Michael Bloomberg will invest $10 million over two years to help top students from poor families into college.

The links between tanning beds and skin cancer are well known, but a survey of the top colleges and universities in the U.S. shows that many allow tanning beds on campus.