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Title: Discovery Pushes Back the Clock on Human Hand Evolution
Source:
popular-archaeology.com
URL Source: http://popular-archaeology.com/issu ... -clock-on-human-hand-evolution
Published: Dec 16, 2013
Author: Matthew Tocheri, National Museum of Natu
Post Date: 2013-12-16 21:43:13 by buck
Keywords: None
Views: 7564
Comments: 15
Any hominin fossil find would be considered a rarity when compared to the abundance of finds from other ancient animals. But this fossil was rarer still, for two reasons. First, it was a type of bone (the third metacarpal in the hand) that, along with other distinct anatomical features, allowed humans, in contrast to other primates, the ability to make tools and perform other manipulative functions that are unique to humans. Second, it was dated to about 1.42 million years ago. It constitutes the earliest evidence of a modern human-like hand, indicating that this anatomical feature existed more than half a million years earlier than previously known. Researchers suspect the bone belonged to the early human species, Homo erectus, a human species that existed between 1.8 million and 143,000 years ago. It is considered the first human species to go global --- geographically, Home erectus fossil remains have been found in East Africa, Georgia, India, Sri Lanka, China and Java. The bone was found near sites where the earliest Acheulian tools have appeared. Acheulian tools are ancient, shaped stone tools that include stone hand axes more than 1.6 million years old. They are most often associated with the presence of Homo erectus. "What makes this bone so distinct," says Carol Ward, professor of pathology and anatomical sciences at the University of Missouri-Columbia and lead author of the study, "is the presence of a styloid process, or projection of bone, at the end that connects to the wrist. Until now, this styloid process has been found only in us, Neandertals and other archaic humans" whose remains have been dated to much later times. humanhandstyloid The styloid process is a projection of bone. Ward and her team found a styloid process at the end of a hand/wrist bone more than 1.42 million years old, indicating this anatomical feature existed more than half a million years earlier than previously known. By explanation, above, Australopithecus is an early hominin that is generally thought to be ancestral to, and predates, the Homo genus, which contains the earliest species of the human line. Credit: University of Missouri In 2011, a team led by Fredrick Manthi from the West Turkana Paleontology Project of the National Museums of Kenya discovered a well-preserved hominin (early human ancestor) hand bone from the site of Kaitio, located in northern Kenya west of Lake Turkana.
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Begin Trace Mode for Comment # 6.
#1. To: All (#0)
Oh my! The age is a wee bit more than 4,000 years old based on Stone's Sunday school teacher's interpretation of the Bible.
They just said that. They offered zero proof. What is that based on. Can you explain it?
It seems the timeline keeps pushing out farther down the timeline. Every new discovery seems to add on a few million or billion years to fit the model.
#8. To: redleghunter (#6)
Once they take off their blinders. They might revise it a few million in the other direction. Then they could be right. The percdentages that they change it to "make it fit". Aren't any bigger then the percentages they would need to change it to make it correct.
Top • Page Up • Full Thread • Page Down • Bottom/Latest1.42 million years old
#2. To: buck (#1)
1.42 million years old
#6. To: A K A Stone (#2)
Replies to Comment # 6. It seems the timeline keeps pushing out farther down the timeline. Every new discovery seems to add on a few million or billion years to fit the model.
End Trace Mode for Comment # 6.
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