Do some people need less sleep? Twin study links sleep time to gene (VIDEO).

A Gene May Help Explain Why Some People Need Less Sleep (Video)  

A Gene May Help Explain Why Some People Need Less Sleep (Video)  

Slate in motion.
Sept. 29 2014 5:25 PM

Why Do Some People Need More Sleep Than Others?

The science of “short sleepers.”

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BIRMINGHAM, ENGLAND - MARCH 07: Caitlin, aged 9, sleeps on her Irish wolfhound on the first day of Crufts dog show at the NEC on March 7, 2013 in Birmingham, England. The four-day show features over 25,000 dogs, with competitors travelling from 41 countries to take part. Crufts, which was first held in1891, sees thousands of dogs vie for the coveted title of 'Best in Show'. (Photo by Oli Scarff/Getty Images)

Photo by Oli Scarff/Getty Images

Research recently published in Sleep focused on 100 pairs of healthy same-sex twins with divergent sleep habits, tracing their differences to a gene called BHLHE41.

Dallas Jensen is a regular video contributor to Slate.