Ocean Pollutant Research In the latest installment of NPR National Geographic Radio Expeditions, NPR's Alex Chadwick takes us to the Sea of Cortez. Alex travels with whale researcher Roger Payne and his team who are trying to determine the amount of pollutants in the seas by examining tissue samples from whales.

Ocean Pollutant Research

Ocean Pollutant Research

Audio will be available later today.

In the latest installment of NPR National Geographic Radio Expeditions, NPR's Alex Chadwick takes us to the Sea of Cortez. Alex travels with whale researcher Roger Payne and his team who are trying to determine the amount of pollutants in the seas by examining tissue samples from whales.