Difference between revisions of "5. Characteristics of H. Habilis"

From SJS Wiki
Jump to: navigation, search
 
(14 intermediate revisions by 4 users not shown)
Line 1: Line 1:
 
Return to [[History 8 Human Origins Concepts]]
 
Return to [[History 8 Human Origins Concepts]]
  
−
This species, one of the earliest members of the genus Homo, has a slightly larger braincase and smaller face and teeth than in Australopithecus or older hominin species. But it still retains some ape-like features, including long arms and a moderately-prognathic face.
+
Homo Habilis, literally meaning 'handy man', was a species that evolved from the Australopithecus and lived from 2.4 - 1.5 million years ago (mya). This species was physically no taller than four feet and no heavier that 110 pounds, however contained brains of 800 cc that were 50 percent larger than those of the australopithecines. The skulls have thin walls and are rounded compared to the low and flattened skulls of later species. Based on their smaller though still strong jaws, Homo Habilis had a broad diet including tougher foods such as woody plants and animal tissues though not hard foods. They are often associated with meat and marrow eating through evidence of large animal slaughter. The difference between males and females is still unclear. Though steadily becoming more humnan-like, Homo Habilis still retains some ape-like features including long arms and a slightly prognathic face. Homo Habilis were the first species able to utilize tools for their benefit, and learned to make stone tools through chipping. The species obtained their name through their making of stone tools. The first fossils of Homo Habilis were discovered at Olduvai Gorge, Tanzania around 1960.
  
−
Its name, which means ‘handy man’, was given in 1964 because this species was thought to represent the first stone-tool maker.  Currently, the oldest stone tools are dated slightly older than the oldest evidence of the genus Homo.
 
−
Evolutionary Tree Information:
 
−
This species, along with H. rudolfensis, is one of the earliest members of the genus Homo. Many scientists think it is an ancestor of later species of Homo, possibly on our own branch of the family tree. Naming this species required a redefining of the genus Homo (e.g., reducing the lower limit of brain size), sparking an enormous debate about the validity of this species.
 
  
−
While scientists used to think that H. habilis was the ancestor of Homo erectus, recent discoveries in 2000 of a relatively late 1.44 million-year-old Homo habilis (KNM-ER 42703) and a relatively early 1.55 million-year-old H. erectus (KNM-ER 42700) from the same area of northern Kenya (Ileret, Lake Turkana) challenged the conventional view that these species evolved one after the other. Instead, this evidence - along with other fossils - demonstrate that they co-existed in Eastern Africa for almost half a million years.
+
http://media-2.web.britannica.com/eb-media/39/79539-004-6D93BE53.jpg
  
−
'''Year of Discovery: 1960
+
http://humanorigins.si.edu/sites/default/files/imagecache/thumb_sqr_160/images/square/habilis_KNMER1813_skull_CC_lt_3qtr_sq.jpg
−
History of Discovery:'''
+
−
A team led by scientists Louis and Mary Leakey uncovered the fossilized remains of a unique early human between 1960 and 1963 at Olduvai Gorge in Tanzania. The type speciman, OH 7, was found by Jonathan Leakey, so was nicknamed "Jonny's child". Because this early human had a combination of features different from those seen in Australopithecus, Louis Leakey, South African scientist Philip Tobias, and British scientist John Napier called these remains a new species: Homo habilis, meaning ‘handy man', because they suspected that it was this slightly larger-brained early human that made the thousands of stone tools also found at Olduvai Gorge.
+
  
−
'''How They Survived:'''
 
−
Early Homo had smaller teeth than Australopithecus, but their tooth enamel was still thick and their jaws were still strong, indicating their teeth were still adapted chewing some hard foods (possibly only seasonally when their preferred foods became less available).  Dental microwear studies suggest that the diet of H. habilis was flexible and versatile and that they were capable of eating a broad range of foods, including some tougher foods like leaves, woody plants, and some animal tissues, but that they did not routinely consume or specialize in eating hard foods like brittle nuts or seeds, dried meat, or very hard tubers.
 
  
−
Another line of evidence for the diet of H. habilis comes from some of the earliest cut- and percussion-marked bones, found back to 2.6 million years ago. Scientists usually associate these traces of butchery of large animals, direct evidence of  meat and marrow eating, with the earliest appearance of the genus Homo, including  H. habilis.
+
Resources:
  
−
Many scientists think early Homo, including H. habilis, made and used the first stone tools found in the archaeological record—these also date back to about 2.6 million years ago; however, this hypothesis is difficult to test because several other species of early human lived at the same time, and in the same geographic area, as where traces of the earliest tool use have been found.
+
- ''Origins Manual'', page 26, 27
  
−
'''Height:'''
+
- http://humanorigins.si.edu/evidence/human-fossils/species/homo-habilis
−
average 3 ft 4 in - 4 ft 5 in (100 - 135 cm)
+
  
−
'''Weight:'''
+
- http://www.britannica.com/topic/Homo-habilis
−
average 70 lbs (32 kg)
+
  
−
'''Height & Weight Supplemental Information:'''
+
Pictures:
−
Male-female body size difference is uncertain, because most post-cranial remains have not been attributed to male or female.
+
  
−
Smithsonian National Museum of Natural History (http://humanorigins.si.edu/evidence/human-fossils/species/homo-habilis)
+
- [http://media-2.web.britannica.com/eb-media/39/79539-004-6D93BE53.jpg Homo Habilis]
 +
 
 +
- [http://humanorigins.si.edu/sites/default/files/imagecache/thumb_sqr_160/images/square/habilis_KNMER1813_skull_CC_lt_3qtr_sq.jpg Homo Habilis Skull]
 +
 
 +
 
 +
Yukiko Chevray

Latest revision as of 23:01, 12 October 2015

Return to History 8 Human Origins Concepts

Homo Habilis, literally meaning 'handy man', was a species that evolved from the Australopithecus and lived from 2.4 - 1.5 million years ago (mya). This species was physically no taller than four feet and no heavier that 110 pounds, however contained brains of 800 cc that were 50 percent larger than those of the australopithecines. The skulls have thin walls and are rounded compared to the low and flattened skulls of later species. Based on their smaller though still strong jaws, Homo Habilis had a broad diet including tougher foods such as woody plants and animal tissues though not hard foods. They are often associated with meat and marrow eating through evidence of large animal slaughter. The difference between males and females is still unclear. Though steadily becoming more humnan-like, Homo Habilis still retains some ape-like features including long arms and a slightly prognathic face. Homo Habilis were the first species able to utilize tools for their benefit, and learned to make stone tools through chipping. The species obtained their name through their making of stone tools. The first fossils of Homo Habilis were discovered at Olduvai Gorge, Tanzania around 1960.


79539-004-6D93BE53.jpg

habilis_KNMER1813_skull_CC_lt_3qtr_sq.jpg


Resources:

- Origins Manual, page 26, 27

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

- http://www.britannica.com/topic/Homo-habilis

Pictures:

- Homo Habilis

- Homo Habilis Skull


Yukiko Chevray

Retrieved from "http://wiki.sjs.org/wiki/index.php?title=5._Characteristics_of_H._Habilis&oldid=34571"