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Light & Lag

Noah talks with Dr. Charles Czeisler (SIZE-ler), Associate Professor of Medicine at Harvard Medical School, and senior author of a new study on human response to light. The study, published today in the journal Nature, shows that normal levels of indoor light, not just bright light, can reset the human biological clock. Czeisler says that, thanks to Edison, our bodies are in a permanent state of jet lag.

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