Crooked Teeth? Blame Early Farmers
When humans turned from hunting and gathering to farming some 10,000 years ago, they set our species on the road to civilization. Agricultural surpluses led to division of labor, the rise of cities, and technological innovation. But civilization has had both its blessings and its curses. One downside of farming, a new study demonstrates, was a shortening of the human jaw that has left precious little room for our teeth and sends many of us to an orthodontist's chair.
Although all living humans belong to one species, Homo sapiens, there are recognizable differences in the shapes of our skulls and faces across the world. In recent years, anthropologists have concluded that most of this geographic variation in skull shape is due to chance, so-called genetic drift, rather than natural selection. But some features of our faces, including the shape of our lower jaws, don't seem to follow this random pattern....
comments powered by Disqus
- Study: Violent radicalism in UK isn't associated with poverty
- CONFIRMED: the Shrine of Jonah/Mosque of Yunus (Nineveh, Mosul, Iraq) has been destroyed
- Chinese President Xi Jinping: Nobody can change history
- Iraq’s Long-Lost Mythical Temple Has Been Found…and Is In Danger of Disappearing Again
- CBS features in-depth coverage of the 50th anniversary of the signing of the Civil Rights law
- Obama to award National Humanities Medals to 3 historians
- Historian Curt Gentry, known for Hoover biography and ‘Helter Skelter,’ dies at 83
- Harvard historian: strategy of climate science denial groups 'extremely successful'
- Curators at Victoria and Albert Museum are pushing the boundaries of collecting
- Ukrainian Leaders Are Using David Barton's Theocratic Pseudo-History To Build Their Nation