Desc: Dégel Du Pergélisol: Une Bombe À Retardement: Directed by Rémi Forte. The permafrost, that frozen layer that makes up 25% of the northern hemisphere's dry land, was formed during the last ice age, imprisoning gas, bacteria, viruses... The story could well end there, but over the last thirty years, climate change has woken the frozen giant. Is it already too late?