Study “presents the first physical evidence that Snowball Earth reached the heart of continents at the equator” says lead ...

Both are a land of giant sequoia trees, huge granite rock formations ... But if you are lucky enough to see a pika, they are ...

This autumn, like most others, social media is flooded with photos and stories from Yosemite Valley, a vertical wonderland long considered climbing’s Center of the Universe.

Its rocky yellow-blazed trail is challenging ... We studied the fissures in the granite face, the high overhang and huge boulders at the base that had broken off and tumbled down. We walked around to ...