If you missed this week's Horizon about NASA's latest Mars rover, catch up using the BBC iPlayer here.
Watch as Horizon takes a peek at NASA's final preparations. Will the car-sized Curiosity rover land successfully using its ambitious sky crane mechanism? Then, if all goes to plan, what might the rover find on the Red Planet?
And next Monday (6 August) at 7.30pm, tune into BBC World Service for an episode of Discovery all about the Curiosity rover. The BBC’s space and astronomy specialist, Jonathan Amos, will look at the questions scientists hope the rover is going to answer, including whether or not there is life on Mars.