On the way you’ll find lush hanging gardens, brave ponderosa pines clinging to the sheer cliff walls, which loom up to 2,000ft above you, and vast sandstone cobbles, rendered smooth as marbles ...

"These granite cobbles are a really nice product," said Kevin Piers, of Decorative Paving. "It is very expensive to try to find new ones. And really, they don't go bad." ...

No-one expects the West Antarctic Ice Sheet to collapse anytime soon, but the little sandstone cobble is a warning, scientists believe, of the conditions we could eventually re-create if we don't ...