and alasdair goes behind the scenes at disneyland paris to find out how tech is being used to bring theers to life in one of the attraction�*s most popular shows. what happens if our most valuable data is lost? or if, years from now, the technology it's stored on becomes obsolete? the search is on to find solutions that will stand the test of time, and one answer may lie close to the north pole. svalbard is an archipelago high above the arctic circle. isolated and far away, its home to a vault that aims to be the ultimate back—up for our data. we're about to head inside a former coal mine. it closed down three decades ago, and now its home to the arctic world archive. it's certainly an unlikely location. it's a remote destination, far away from wars, crises, terrorism, disasters. and it's regulated by an international treaty. it's a demilitarised zone, so what could be safer? far away from everything, accepted by all the superpowers in the world. well, i guess we can switch our lights on and head into the darkness. let's go. let's do that. we're going 300m deep into the permafrost, wher