Greg Yaghmai is about to embark on an unprecedented challenge: running seven marathons on seven continents in just seven days.

It’s also a natural process happening more frequently because of human-caused climate change, said British Antarctic Survey physical oceanographer Andrew Meijers, who examined the iceberg up close in ...

Antarctica is not truly home to anyone, as far as we know, but between 1,000 and 10,000 hardy workers can be stationed there, depending on the season, while around 40,000 tourists come and go each ...