CHILDREN at Upperthong infants and junior school in Holmfirth, West Yorkshire, are beginning to be convinced there is life out there after all. The school had put all details of its 200 five to 11-year-olds on a CD-Rom, included on the Mars Polar Lander spacecraft. The space probe, to the embarrassment of NASA scientists, has now gone missing. "One or two of the children have said to me 'Do you think the Martians have got the spaceship, and taken it apart?'" said deputy head, Chris Wise.