Siberian crater mystery solved

Thom discusses everything science in tonight’s special edition science show: Earth’s population problem with Population Action International’s Suzanne Ehlers, the mystery of the Siberian crater with Climatologist Dr. Michael Mann, how nature can solve our planet’s problems with Biomimicry’s Janine Benyus and how ocean acidification may cripple Alaska’s economy with Dr. Sebastian Troëng of Conservation International and Dr. Brenda Ekwurzel with the Union of Concerned Scientists.