The Sun has unleashed four potent solar flares this week, marking the most intense activity yet this year and causing limited interruptions to high-frequency radio communications.

U.S. researchers reported a breakthrough in stem cell research on Wednesday, describing how they have turned human skin cells into embryonic stem cells for the first time.

The thought of eating beetles, caterpillars and ants may give you the creeps, but the authors of a U.N. report published on Monday said the health benefits of consuming nutritious insects could help fight obesity.

Dozens of Iberian black pigs, with their pointy snouts, large ears, tiny eyes and dark skin, grunt as they forage in a wide green field.

Sky-gazers were treated to an annular solar eclipse in remote areas of Australia on Friday, with the Moon crossing in front of the Sun to leave a “ring of fire” around its silhouette.

Do you dream of living on Mars? Then turn on your webcam. You've got an application video to make.

Brazilian geologists on Monday announced the discovery, 1,500 kilometers (900 miles) from Rio, of what could be part of the continent submerged when the Atlantic Ocean was formed as Africa and South America drifted apart 100 million years ago.

A baby Sumatran orangutan swings playfully on a branch at an Indonesian rescue center, a far cry from the terror he endured when his pristine rainforest home was razed to the ground.

Australia insisted it was committed to protecting the Great Barrier Reef on Saturday after the U.N. warned that the natural wonder's world heritage status could be in downgraded in 2014.

Scientists revealed Wednesday that they have found the first solid archaeological evidence that some of the earliest American colonists at Jamestown, Virginia, survived harsh conditions by turning to cannibalism.