At the end of the last global ice age, the deep-frozen Earth reached a built-in limit of climate change and thawed into a ...

New research suggests that ancient Mars, despite its icy conditions, once had rivers, lakes, and even a vast ...

At blistering minus 94 degrees Celsius, these coldest places on earth below sit at the top of the most outlandish holiday ...

Meet the world's most intrepid twins who fly, cycle, climb, row and walk the planet's most extreme locations. Ross and Hugo, ...

On a cold, ancient Mars, rivers flowed and a lake the size of the Mediterranean Sea swelled under the protection of thick ice ...