Curiosity identifies Earth-like rock - and has its first carwash

The first rock to be touched by NASA's Curiosity rover - dubbed Jake Matijevic - turns out to have a very Earth-like composition, different to anything before seen on Mars.

Curiosity rover starts firing laser

Yesterday, an invader from another planet fired off a laser 30 times, in what we have to hope won't be seen as an act of aggression by any overlooked Martian inhabitants.

Messenger probe reveals Mercury surprises

Mercury's a bit weird, say NASA scientists, with a different surface composition and magnetic field to other planets.