Difference between revisions of "10. Characteristics of H. ergaster"

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Homo ergaster was the probable ancestor of the later homo populations. It emerged in early African populations nearly 1.9 million years ago. H. ergaster had a prominent browridge, a rounded skull, and its teeth were very small, especially when it was compared to the teeth of Australopithecus. One of the major discoveries of a H. ergaster was the Nariokotome Boy. His facial features included thick bony ridges across his eyes, buck teeth sticking out of his protruding mouth, and a long, wide nose. Anyways, H. ergaster's body was probably smooth, nearly hairless, and was one of the first hominids to regulate its body temperature by sweating. Its skin would have also been most likely dark to protect it from the Sun's rays. H. ergaster traveled mostly on foot, searching for meat to feed its growing brain and body. To be able to conserve energy in his muscles while walking upright, H. ergaster developed a narrower pelvis. Because of this tighter pelvis, it cause the lower part of the ribs to narrow, while the upper part of the ergaster's rib cage expanded, giving its chest a more barrel shape. Also due to this tight pelvis, baby H. ergasters were born immature in the brain, allowing its brain to grow after it has been born. This proved a disadvantage because Homo ergasters were nearly helpless for the first year of its life. Nearly 1.6 million years ago, with help from this giant, complex brain, H. ergasters began using Oldowan stone tools and heart shaped handaxes. Overall, H. ergaster evolved a lot from the earlier hominids, and it later will evolve into a more sophisticated organism.
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Return to [[History 8 Human Origins Concepts]]
  
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'''Average Height:''' 6 feet and 1 inch
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Homo ergaster, simply meaning working man, lived 1.3 - 1.8 million years ago. New physical features helped them adapt to the unfamiliar evolving African climates. They had longer noses which cooled them down in the hot sun, no body hair, were bipedal, so the sun would only heat the top of their head whereas before when they walked on four legs the sun heated their entire backs, and they also began to sweat, keeping their bodies and brains at a safe temperature. The Homo ergaster had enormous brains leading to new inventive technology. The Homo ergaster's tall bodies and large brains required a lot of energy to properly function. They ate meat to acquire the protein they needed creating bamboo and bi-facial stone tools to hunt their prey and were also the first to make a fire. 
  
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'''Important Discoveries:''' discovery of Nariokotome Boy
 
  
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Source(s):
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http://anthro.palomar.edu/homo/images/H_ergaster.jpg http://www.bbc.co.uk/staticarchive/f15b2b2f524ac6debf3a61ea56df4210cb7e480f.jpg
  
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-[http://www.bbc.co.uk/sn/prehistoric_life/human/human_evolution/leaving_home1.shtml]
 
  
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-Lab Manual pg.23
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http://humanorigins.si.edu/evidence/human-fossils/species/homo-erectus
  
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http://www.bbc.co.uk/sn/prehistoric_life/human/human_evolution/leaving_home1.shtml
  
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Image(s):
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The Video Guide: "Walking with Cavemen"
  
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-[http://www.valleyanatomical.com/catalog/images/H1MT2-Homo-Ergaster.jpg]
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Left picture from: http://anthro.palomar.edu/homo/homo_2.htm
  
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-[http://www.bbc.co.uk/sn/prehistoric_life/human/human_evolution/images/human_evolution_article_big3.jpg]
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Right picture from: http://www.bbc.co.uk/sn/prehistoric_life/human/human_evolution/leaving_home1.shtml
  
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Sara Doyle
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-Alexander Kim
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Return to [[History 8 Human Origins Concepts]]
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Latest revision as of 09:13, 18 October 2015

Return to History 8 Human Origins Concepts

Homo ergaster, simply meaning working man, lived 1.3 - 1.8 million years ago. New physical features helped them adapt to the unfamiliar evolving African climates. They had longer noses which cooled them down in the hot sun, no body hair, were bipedal, so the sun would only heat the top of their head whereas before when they walked on four legs the sun heated their entire backs, and they also began to sweat, keeping their bodies and brains at a safe temperature. The Homo ergaster had enormous brains leading to new inventive technology. The Homo ergaster's tall bodies and large brains required a lot of energy to properly function. They ate meat to acquire the protein they needed creating bamboo and bi-facial stone tools to hunt their prey and were also the first to make a fire. 


H_ergaster.jpg f15b2b2f524ac6debf3a61ea56df4210cb7e480f.jpg


http://humanorigins.si.edu/evidence/human-fossils/species/homo-erectus

http://www.bbc.co.uk/sn/prehistoric_life/human/human_evolution/leaving_home1.shtml

The Video Guide: "Walking with Cavemen"

Left picture from: http://anthro.palomar.edu/homo/homo_2.htm

Right picture from: http://www.bbc.co.uk/sn/prehistoric_life/human/human_evolution/leaving_home1.shtml

Sara Doyle

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