The US space agency’s Mars rovers are celebrating a remarkable five years on the red Planet, Mars. The first robot named, Spirit arrived on the planet on 3rd January 2004 and it was original expected that the machine would only last three months to find any vital information about the planet's make-up. So far the rovers’ data has picked up vital information about the existence of water from billions of years ago which could indicate that there was or is life on the planet.