Researchers diving in a submersible in the eastern Pacific realized that the landscape they had studied the day before had ...

A tiny Swedish village in the Arctic Circle is widely considered the best place in the world to see the northern lights. And getting there promises to be just as exciting. Watch this video to learn ...

Explorers descended into a 500-foot-deep cave—only to find something even more mysterious below: a perfectly blue, seemingly bottomless hole. Learn what makes this rare geological formation so ...