Zombie viruses are waking up after 50,000 years as planet warms

The thawing of permafrost in the Arctic due to climate change is releasing ancient viruses and pathogens, posing a new danger to public health. Virologist Jean-Michel Claverie has spent over a decade studying "giant" viruses found in Siberian permafrost, some of which remain infectious. Concerns are growing that as the Arctic...