How and Why Our Faces Evolved the Way They Did
Our faces are the most distinctive feature used to identify other people.
The modern human face is distinctively different to that of our near relatives and now researchers believe its evolution may have been partly driven by our need for good social skills
As large-brained, short-faced hominins, our faces are different from other, now extinct hominins (such as the Neanderthals) and our closest living relatives (bonobos and chimpanzees), but how and why did the modern human face evolve this way?
These are skulls of hominins over the last 4.4 million years.
Credit: Rodrigo Lacruz
They conclude that social communication has been somewhat overlooked as a factor underlying the modern human facial form. Our faces should be seen as the result of a combination of biomechanical, physiological and social influences, the authors of the study say.
The researchers suggest that our faces evolved not only due to factors such as diet and climate, but possibly also to provide more opportunities for gesture and nonverbal communication – vital skills for establishing the large social networks which are believed to have helped Homo sapiens to survive.
“We can now use our faces to signal more than 20 different categories of emotion via the contraction or relaxation of muscles”, says Paul O’Higgins, Professor of Anatomy at the Hull York Medical School and the Department of Archaeology at the University of York. “It’s unlikely that our early human ancestors had the same facial dexterity as the overall shape of the face and the positions of the muscles were different.”
Instead of the pronounced brow ridge of other hominins, humans developed a smooth forehead with more visible, hairy eyebrows capable of a greater range of movement. This, alongside our faces becoming more slender, allows us to express a wide range of subtle emotions – including recognition and sympathy.
“We know that other factors such as diet, respiratory physiology and climate have contributed to the shape of the modern human face, but to interpret its evolution solely in terms of these factors would be an oversimplification,” Professor O’Higgins adds.
Credit: University of York
This facial shrinking process has become particularly marked since the agricultural revolution, as we switched from being hunter gatherers to agriculturalists and then to living in cities – lifestyles that led to increasingly pre-processed foods and less physical effort.
“Softer modern diets and industrialised societies may mean that the human face continues to decrease in size”, says Professor O’Higgins. “There are limits on how much the human face can change however, for example breathing requires a sufficiently large nasal cavity.”
“However, within these limits, the evolution of the human face is likely to continue as long as our species survives, migrates and encounters new environmental, social and cultural conditions.”
Contacts and sources:
Shelley Hughes
Citation:The evolutionary history of the human face Rodrigo S. Lacruz, Chris B. Stringer, William H. Kimbel, Bernard Wood, Katerina Harvati, Paul O’Higgins, Timothy G. Bromage & Juan-Luis Arsuaga Nature Ecology & Evolution (2019) | https://www.nature.com/articles/s41559-019-0865-7
Source: http://www.ineffableisland.com/2019/04/our-faces-are-most-distinctive-feature.html
Anyone can join.
Anyone can contribute.
Anyone can become informed about their world.
"United We Stand" Click Here To Create Your Personal Citizen Journalist Account Today, Be Sure To Invite Your Friends.
Please Help Support BeforeitsNews by trying our Natural Health Products below!
Order by Phone at 888-809-8385 or online at https://mitocopper.com M - F 9am to 5pm EST
Order by Phone at 866-388-7003 or online at https://www.herbanomic.com M - F 9am to 5pm EST
Order by Phone at 866-388-7003 or online at https://www.herbanomics.com M - F 9am to 5pm EST
Humic & Fulvic Trace Minerals Complex - Nature's most important supplement! Vivid Dreams again!
HNEX HydroNano EXtracellular Water - Improve immune system health and reduce inflammation.
Ultimate Clinical Potency Curcumin - Natural pain relief, reduce inflammation and so much more.
MitoCopper - Bioavailable Copper destroys pathogens and gives you more energy. (See Blood Video)
Oxy Powder - Natural Colon Cleanser! Cleans out toxic buildup with oxygen!
Nascent Iodine - Promotes detoxification, mental focus and thyroid health.
Smart Meter Cover - Reduces Smart Meter radiation by 96%! (See Video).
ffs people EVILution is a fairy tale……its impossible……wake up.