A former desert oasis faces environmental challenges, a water crisis and someday the Big One. Why we can't let the sun go down on the Salton Sea.

An ancient global warming episode drastically changed the planet. Life on Earth needed 200,000 years to recover. What we're headed for in the next century could be even bigger.

Developed as part of the CUAHSI Watershed Media Project.

Developed as part of the CUAHSI Watershed Media Project.

Developed as part of the CUAHSI Watershed Media Project

A documentary about volcanic eruptions.

A documentary about volcanic eruptions.

A documentary of tectonics.

A geologist probes the earliest secrets of the planet looking for traces of ancient life forms.