Professor Mark Sims on the discovery that Beagle 2 made it to the surface

The drill at the end of the Curiosity Mars rover’s robot arm is back in action after being sidelined for more than a year by a mechanical problem. A new technique was successfully tested 20 May after months of engineering tests on Earth.

While Mars doesn’t have much in the way of Earth-like weather, it does evidently share one kind of weird meteorology: acid fog. Planetary scientist Shoshanna Cole has pieced together a compelling story about how acidic vapours may have eaten at the rocks in Gusev Crater on Mars using a variety of data gathered by instruments on the 2003 Mars Exploration Rover Spirit.

NASA’s Opportunity Mars rover landed on the red planet 15 years ago 24 January; engineers are still attempting contact in the wake of a global dust storm last year.