A collapsed Mars lava chamber seen from space

Lava tubes and chambers attract a lot of attention as potential sites for bases on the moon and Mars. They provide protection from radiation, from temperature swings, and even from meteorites. They beg to be explored.

Image: Voyage around Earth

ESA astronaut Tim Peake took this picture from the International Space Station and commented: "Today the International Space Station completed its 100 000th orbit of our beautiful planet Earth! An amazing feat of science, ...

Google Maps makes Grand Canyon virtual trek

Google Maps opened a virtual path to the wonders of the Grand Canyon on Thursday by adding panoramic images gathered by hikers with Android-powered camera systems strapped to their backs.

Temperature extremes on Mars

"Mars ain't no kind of place to raise your kids; in fact it's cold as hell" sang Elton John in "Rocket Man", and although the song was released in 1972—four years before the first successful landing on Mars—his weather ...