For the first time, the entire TransAmerica Trail—5,900-plus miles of off-road adventure—is now available on Street View.

Five global space agencies are preparing landmark missions to explore Venus—Earth's fiery twin—unlocking secrets about its atmosphere, surface, and volcanic past.

Venus just lost its last active spacecraft, but more might be coming in a few years. The Japanese Aerospace Exploration ...

AcrossIran, vast stretches of land are steadily collapsing. In some regions, the ground is sinking at a pace of up to 30 ...