Water on Mars Again!
In October 2015 we had news of the discovery of water on Mars \u2013 again! Almost a perennial story now, but is this discovery any different to previous discoveries, some of which stretch back to the 1970s? To find out more about this particular story, I spoke to UCL planetary scientist Peter Grindrod.\n\nOriginally broadcast on 29th October\xa02015 as part of Pythagoras\u2019 Trousers on Radio Cardiff.