Are you an early bird or a night owl? One may live longer than the other concludes study

It is believed genetics and environment both play a part in what makes someone a night owl or a morning lark.”You’re not doomed,” Ms Knutson said.

“Part of it you don’t have any control over and part of it you might.”

She recommended trying to keep a regular bedtime and doing things earlier in the day, and she believed working hours should be adjusted accordingly.

“If we can recognize these chronotypes are, in part, genetically determined and not just a character flaw, jobs and work hours could have more flexibility for owls,” she added.