Nova: Season 45, Episode 10

45 - 10: Volatile Earth: Volcano on Fire

Climb with volcano experts to the summit of Nyiragongo, a highly active volcano in the Democratic Republic of the Congo and one of the world's least studied. Twice in recent memory it has erupted, devastating Goma, a neighboring city of 1 million people. To investigate when it might erupt next, volcanologists descend into its crater toward its bubbling and seething lava lake to deploy sensors and monitor the volcano's activity.