Lost, found, then lost again

The wreckage of Nasa's Mars Polar Lander spacecraft, which was lost in 1999, presumed crashed onto the surface, was tentatively identified on the surface last year by the orbiting European Mars Global Surveyor, but now it appears it was a case of mistaken identity. According to scientists, the features identified as the lander and it's parachute, were in fact nothing but natural features. BBC news has more.