Mars is about 140 million miles from our cozy planet. A human mission to that cold, rocky neighbor would mean being away from Earth for about 3 years. But the things those explorers would see and ...

Perched on top of Santorini's sheer cliffs is a world-famous tourist industry worth millions. Underneath is the fizzing risk ...

Santorini in Greece was created by a volcanic eruption. Now, it is feared that another volcanic eruption could destroy it.

Volcanoes have stirred human awe for thousands of years, with their bursts of fire and rivers of molten rock. Yet, beyond the ...