Untold Earth

Pando, Latin for 'I spread,' appears to be a forest but is actually one massive tree. Weighing 13 million pounds, Pando is the world's largest living organism. 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.

The Atchafalaya River Basin is the United States' largest river swamp and Louisiana's first line of defense against the extreme weather that threatens the Gulf Coast. How does this swamp and its Cypress trees protect us from extreme weather? And how can we protect them?