(the short jawbones and overcrowded teeth) my article summary

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Here is the original article.
news.discovery.com/human/jaw-size-human-diet-evolution-111122.html

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Summary
This article reveals the fact behind the short jawbones and overcrowded teeth. Depending on a research with detailed measurements of the skulls and jawbones for about 300 individuals from 11 different subsistence cultures and measurements for people in the past 2000 year , conducted by Carmon-Taubadel, assert that lifestyle contributes significantly on the structure of human jawbones. For instance, those people who live on so-called civilized countries used to eat soft foods of an agricultural diet have smaller jawbones and tend to suffer from the problems of overcrowded teeth. However those people how lived on primitive agriculture and used to eat a hunter-gather-type diet have larger jaws. Additionally, she tried to find a correlation between jawbones sshape with some factors such as climate, geography, genetic make up and lifestyle. She found that there is no genetic reasons but biomechanical. Moreover there is some evidence that jawbone may change with diet. Further study done by researchers at Adelaide University back in the 1950s looked at the Warlpiri Aboriginals people. In the past, they were famous for their large teeth, large chewing muscles and projecting faces. Currently, their jaw bones have started to be smaller with overcrowded teeth.

There is a variety of detailed measurements on the skull and jawbone. These measurements are on 11 different cultures from people in the past 2000 years.

Anthropologist Carmon-Taubadel concluded that lifestyle contributes significantly on the structure of human jawbones.

For instance, people who live in civilized countries used to eat soft foods as an agricultural diet. They tend to have smaller jawbones and suffer from overcrowded teeth.

However, people that lived on primitive agriculture had a hunter-gather-type diet and have larger jaws.

Additionally, Carmon-Taubadel tried to find a correlation between jawbones shape with some factors such as climate, geography, genetics and lifestyle.

She found that there are no genetic reasons but bio-mechanical.

Despite her research, there is evidence that the jawbone may change with a certain diet.

Researchers at Adelaide University did studies on the Warlpiri Aboriginals people in the 1950s.

Warlpiri Aborignals were famous for their large teeth, large chewing muscles and projecting faces.

Currently, their jaw bones have grown to be smaller with overcrowded teeth.