Untold Earth

Locked within the stones and fossils of Petrified Forest National Park lies a record of life, death, and resilience during one of Earth's most extreme periods of environmental change. What secrets do these fossilized ecosystems reveal about the prehistoric past, and how can they help predict the future of life on Earth?

In the Atchafalaya Basin—the largest river swamp in the U.S.—ancient cypress trees act as natural barriers against hurricanes and extreme weather. Spanning a million acres, these nearly indestructible trees have protected Louisiana's coast for thousands of years. How does this million-acre ecosystem protect Louisiana’s communities, and how can we protect it?

Pando, Latin for 'I spread,' appears to be a forest but is actually one massive tree. Weighing 13 million pounds, Pando is one of the world’s largest living organisms. It has thrived in Utah's Fishlake National Forest, spreading across 106 acres with 47,000 stems. Find out how human intervention has both threatened its survival and sparked a passionate mission to protect it.