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Night owl or early bird? Study finds sleep categories aren't that simple
February 02, 2026
MONTREAL, Quebec, Feb. 2 -- McGill University posted the following news release:

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Night owl or early bird? Study finds sleep categories aren't that simple

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The familiar labels "night owl" and "early bird," long used in sleep research, don't fully capture the diversity of human internal clocks, a new study has found.

The McGill University-led study published in Nature Communications found the two . . .

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