About 30,000 native species, including dwarf birth and montane willows, are to be planted at around 600m (1,968ft) on Cairn ...

This idyllic Colorado mountain town floats at an elevation ... you know what you're getting into. With Silverton's high altitude, Colorado's elements are a powerful force, nothing to scoff at.

In people not adapted to life at altitude, the sparse oxygen can impair fetal growth, causing issues that can last a lifetime ...

The páramo covers slopes above 10,000 feet in elevation all over the Andes Mountains, and acts like a giant sponge absorbing ...