Neanderthal DNA may be affecting the way some humans sleep
Thousands of humans may still be walking the Earth with Neanderthal DNA — and not only that, but traces of the ancient stuff may be influencing skin tone, hair color, and even sleeping patterns in present-day Europeans, a study released Thursday from the Max Planck Institute for Evolutionary Anthropology found.
Using the genetic information of over 100,000 people in the U.K. Biobank, scientists discovered that Neanderthal genes, which make up 1 to 3 percent of the genetic code of people with European descent, may still have a small effect on some physical traits. No trait can be isolated to a particular gene; multiple genetic factors affect skin tone, for example, and Neanderthal genetic material only plays one part in determining the tone. But breakthroughs in researching Neanderthal DNA may help scientists understand how some genetic traits function.
Most interestingly, Neanderthal DNA has been linked to traits associated with light exposure like circadian rhythms, meaning the ancient genes may affect how people sleep in current times. Neanderthals had greater exposure to UVB rays while living on Eurasia for 100,000 years before they mated with Homo sapiens, so they had "more time to get used to a wider range of daylight," NPR explains.
Subscribe to The Week
Escape your echo chamber. Get the facts behind the news, plus analysis from multiple perspectives.
Sign up for The Week's Free Newsletters
From our morning news briefing to a weekly Good News Newsletter, get the best of The Week delivered directly to your inbox.
From our morning news briefing to a weekly Good News Newsletter, get the best of The Week delivered directly to your inbox.
Scientists believe that people indigenous to Africa do not have Neanderthal DNA in their genetic code because their ancestors never migrated to Eurasia. The study is limited because the sample size did not extend beyond the U.K. Biobank, but researchers hope to gain access to other biobanks and databases in the future. Read more about the study at NPR.
Sign up for Today's Best Articles in your inbox
A free daily email with the biggest news stories of the day – and the best features from TheWeek.com
Elianna Spitzer is a rising junior at Brandeis University, majoring in Politics and American Studies. She is also a news editor and writer at The Brandeis Hoot. When she is not covering campus news, Elianna can be found arguing legal cases with her mock trial team.q
-
Long summer days in Iceland's highlands
The Week Recommends While many parts of this volcanic island are barren, there is a 'desolate beauty' to be found in every corner
By The Week UK Published
-
The Democrats: time for wholesale reform?
Talking Point In the 'wreckage' of the election, the party must decide how to rebuild
By The Week UK Published
-
5 deliciously funny cartoons about turkeys
Cartoons Artists take on pardons, executions, and more
By The Week US Published
-
Has the Taliban banned women from speaking?
Today's Big Question 'Rambling' message about 'bizarre' restriction joins series of recent decrees that amount to silencing of Afghanistan's women
By Harriet Marsden, The Week UK Published
-
Cuba's energy crisis
The Explainer Already beset by a host of issues, the island nation is struggling with nationwide blackouts
By Rebekah Evans, The Week UK Published
-
Putin's fixation with shamans
Under the Radar Secretive Russian leader, said to be fascinated with occult and pagan rituals, allegedly asked for blessing over nuclear weapons
By Harriet Marsden, The Week UK Published
-
Chimpanzees are dying of human diseases
Under the radar Great apes are vulnerable to human pathogens thanks to genetic similarity, increased contact and no immunity
By Harriet Marsden, The Week UK Published
-
Deaths of Jesse Baird and Luke Davies hang over Sydney's Mardi Gras
The Explainer Police officer, the former partner of TV presenter victim, charged with two counts of murder after turning himself in
By Austin Chen, The Week UK Published
-
Quiz of The Week: 24 February - 1 March
Puzzles and Quizzes Have you been paying attention to The Week's news?
By Sorcha Bradley, The Week UK Published
-
Will mounting discontent affect Iran election?
Today's Big Question Low turnout is expected in poll seen as crucial test for Tehran's leadership
By Sorcha Bradley, The Week UK Published
-
Sweden clears final NATO hurdle with Hungary vote
Speed Read Hungary's parliament overwhelmingly approved Sweden's accession to NATO
By Peter Weber, The Week US Published