Ever since humans gazed at the night sky, we’ve been drawn to that tiny reddish dot hovering above. Mars has captivated our ...

At 5,100 meters above sea level, this settlement is the highest permanent place humans live on Earth. Oxygen levels are ...

Part of the Tristan da Cunha group, Inaccessible Island has no permanent human settlement. Steep cliffs and a dangerous ...

First, what is an ice age? It’s when the Earth has cold temperatures for a long time – millions to tens of millions of years – that lead to ice sheets and glaciers covering large areas of its surface.