Should they see mountains similar in nature to, say, the Appalachians, they'll know they could have once been much bigger and bonded land masses. Since 2020, multiple planets have been found that ...

Often thought of as eternal, mountains are vulnerable to climate change and tourism. To protect them, they should be recognised for their cultural values, not just their natural characteristics.

By Mary Novakovich, CNN (CNN) — Skiing without borders — when you have breakfast in one country and easily ski into another for lunch. European ski domains that sprawl across international ...