PBS' premier science series helps viewers of all ages explore the science behind the headlines. Along the way, NOVA programs demystify science and technology and highlight the people involved in scientific pursuits.
Millions of people around the world live in the shadow of active volcanoes. Under constant threat of massive volcanic eruptions, their homes and their lives are daily at risk from these sleeping giants. From Japan's Mount Fuji to the "Sleeping Giant" submerged beneath Naples to the Yellowstone "supervolcano" in the United States, travel with scientists from around the world who are at work on these sites, attempting to discover how likely these volcanoes are to erupt, when eruptions might happen and how deadly they could prove to be.
Every year, 100 million monarch butterflies set off on an incredible journey across North America. These beautiful creatures fly 2,000 miles to reach their remote destination: a tiny area high in the mountains of Mexico. Yet scientists are still puzzling over how the butterflies achieve this tremendous feat of endurance - and how, year after year, the monarchs navigate with such hair's-breadth precision. NOVA flies along with the monarchs, visiting the spectacular locations they call home and meeting the dangers they encounter along the way. As this program reveals, the monarch is a scientific marvel locked in an inspiring struggle for survival.