This episode is the next in our oral history series, In Their Own Words. These pieces chronicle the stories of scientists who have made great contributions to their fields. Each month, we will publish in the pages of BioScience, and on this podcast, the results of these conversations.  Today, we are joined by Dr. Neil deGrasse Tyson, Frederick P. Rose Director of the Hayden Planetarium at the American Museum of Natural History, in New York City, and host of COSMOS: Possible Worlds.

Note: Both the text and audio versions have been edited for clarity and length.

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The keys to conserving large mammals, such as bears, often lie in better understanding their ecophysiology. Armed with knowledge about the animals' energy needs, conservationists can encourage actions that better preserve populations and ensure that their habitats will be able to sustain them both now and as the climate continues to rapidly change. In this episode of BioScience Talks, we're joined by Dr. John Whiteman of Old Dominion University, who describes efforts to characterize metabolisms among large mammals from India to the Arctic—and the ways that this work fuels the broader scientific endeavor.

• Read Dr. Whiteman's 2019 BioScience article.
• Read more about polar bear diets (and body temperatures).
• Wildlife SOS
• Free the Bears
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Photograph: Mike Lockhart.