Scientists have been baffled after discovering bizarre structures on the Martian surface which look like 'a patchwork of ...

The scene first transitions from grassy trails to rocky switchbacks, and as you continue, it takes you to an ash-covered summit. At the top, you can see smoke, the sky getting thinner, and the ...

A river that drained the slopes of a now-vanished volcano may have carved Yosemite Valley's depths during the last 10 million ...