Why do some of us feel so tired, while others seem to have endless energy? This hour, host Manoush Zomorodi explores what science is revealing about stress, breathing, cellular energy and the body.

Guests include mitochondrial psychobiologist Martin Picard and science journalist James Nestor.

TED Radio Hour+ listeners now get access to bonus episodes, with more ideas from TED speakers and deeper conversations with Manoush. By signing up for Plus, you directly support our work and public media, so all your episodes (like this one!) come to you without sponsor breaks. Learn more at plus.npr.org/ted.

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