YouTube Saturday - Horizon: Mission to Mars

As the Mars Curiosity Rover (MSL) busies itself on the surface of the red planet, I was reminded on this excellent episode of BBC's Horizon from a few months back. The brilliant episode, which was repeated on the Beeb a few days ago, took a behind the scenes look at NASA as final preparations were being made for one of their most ambitious and most expensive missions ever. With Curiosity recently beaming back images proving water once flowed freely on the Martian surface, hopefully Curiosity is getting closer to answering the question "is there, or has there ever been, life on Mars?".