Dr. M. Sanjayan visits northern California where the largest river restoration project in United States history is aiming to bring life back to a sacred river.

Dr. M. Sanjayan investigates urgent efforts to help coral reefs survive climate change.

In its second year, Changing Planet revisits six of our planet's most vulnerable ecosystems and catches up with the truly inspiring people introduced in the first season: scientists and local experts fighting to safeguard their communities and wildlife, and charting the progress of their game-changing environmental projects.

Join conservation scientist Dr. M. Sanjayan for the beginning of an ambitious 7-year project, a global environmental health check of six of Earth’s bellwether biomes. From the Arctic to the Amazon, these vulnerable habitats are changing, revealing surprising animal behaviors as species adapt. On his journey, he meets inspiring scientists and communities working to bring about positive change.