Scientists say a massive ice sheet in Antarctica is starting to collapse. It's not going to slide into the ocean over night, but rather over centuries. Still, it will fall, scientists say. It's gotten to the point it can't be stopped — and that means rising sea levels.
Those on the Spirit of Mawson Antarctic expedition were relieved and jubilant when they were rescued last week after being stranded on a ship caught in Antarctic pack ice. But some polar scientists were not as jubilant. They question the trip as more a lark than a serious expedition — which diverted several icebreakers from serious scientific work.
Name a place -- discovered in 1904 -- where you can find the southernmost working post office (open to tourists) in the world. It was set up by the British as a base during WWII, then operated as a British research station until 1962. Designated Historic Site No. 61 under the Antarctic Treaty, today it's one of the most popular tourist destinations in Antarctica.
Floods in the Australian state of Queensland exacted a terrible toll last December and January. But one part of the Australian state welcomed the floods and is now thriving: The Outback. The World's Jason Margolis has more from Australia.
Unmanned aerial vehicles have become popular tools in America's wars, but that technology is working its way back stateside. Already, there are a few domestic uses of drones, mostly by law enforcement and the military. But manufacturers have much bigger ideas in mind.