They traveled to Alaska and jumped into a frozen lake in one of the coldest challenges they had ever attempted. Surrounded by snow and near-freezing water, they had only seconds before the shock, ...

Don Juan Pond is a mysterious lake in Antarctica that contains so much calcium chloride, it doesn't freeze in subzero ...

Buried beneath nearly two miles of Antarctic ice, Lake Vostok is one of the most isolated places on Earth – a hidden, ancient ...