Want to know more about today's Science Ask Me Anything (AMA) guests Tessa Hill and Jessica Hellmann? As a part of the series Joe's Big Idea, NPR's Joe Palca sits down with them to talk climate change.
Tessa Hill is an associate professor of Earth and planetary sciences at the University of California, Davis. President Obama named her a recipient of a Presidential Early Career Award for Scientists and Engineers.
Jessica Hellmann is the director of the Institute on the Environment at the University of Minnesota. Hellmann regularly counsels state and national governments on habitat management, restoration and endangered species conservation.