Dubbed as "the closest living thing to Indiana Jones" by Harvard geochemist Daniel Schrag, Dr. Lonnie Thompson captivated the world with his daring and death-defying expeditions to Earth's highest peaks. Over nearly 70 ventures into the planet's most remote and towering terrains, Lonnie spent an unprecedented four-plus years above 18,000 feet, a feat unrivaled by anyone else.

His extraordinary quests involved transporting six tons of equipment to the world's loftiest glaciers, where he drilled into ancient ice to extract invaluable historical records. From these ice cores, Lonnie unearthed climate histories spanning hundreds of thousands of years, details of ancient volcanic activity, and, most significantly, undeniable proof of human-induced climate change – the gravest peril confronting our civilization.

Learn more about Dr. Lonnie Thompson and the film.

Watch the trailer.