New research suggests your night owl tendencies could be hard-wired in your genes. A study looked at 70 people from six families and found that a mutation in a gene called CRY1 was common among those who have a condition known as delayed sleep phase disorder (DSPD).

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New research suggests your night owl tendencies could be hard-wired in your genes. A study looked at 70 people from six families and found that a mutation in a gene called CRY1 was common among those who have a condition known as delayed sleep phase disorder (DSPD).