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Switch to Forum Live View Why do Humans Walk Upright?
6 years ago  ::  Mar 24, 2012 - 2:25PM #1
d_p_m
Posts: 11,236
One of the older questions about human evolution is the origin of bipedalism. Various suggestions have been made, and one or more of them may be true.

New research has added to our understanding of the evolutionary advantages of walking upright, and how that could play out in an evolutionary scenario:

"Here, we report new experimental results showing that wild chimpanzees walk bipedally more often and carry more items when transporting valuable, unpredictable resources to less–competitive places."

www.sciencedirect.com/science/article/pi...

www.dnaindia.com/scitech/report_why-huma...
"If you aren't confused by quantum physics, you haven't really understood it."
― Niels Bohr

"As far as the laws of mathematics refer to reality, they are not certain, as far as they are certain, they do not refer to reality."
-- Albert Einstein

"If one is going to engage with the primordial forces of darkness, one must expect a bit of social awkwardness."
-- Penny Dreadful, season one, episode two
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6 years ago  ::  Mar 24, 2012 - 5:45PM #2
Blü
Posts: 26,191

An interesting observation.  So now we hypothesize tough times in a particular region when upright motion for maximized load-carrying was so basic to hominin survival over so long a period that evolution unambiguously favored offspring fitter for bipedalism.  Seems pausible.


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6 years ago  ::  Mar 24, 2012 - 6:49PM #3
d_p_m
Posts: 11,236

Mar 24, 2012 -- 5:45PM, Blü wrote:


An interesting observation.  So now we hypothesize tough times in a particular region when upright motion for maximized load-carrying was so basic to hominin survival over so long a period that evolution unambiguously favored offspring fitter for bipedalism.  Seems pausible.




Actually, given the results from studies of the effects on successful reproduction rates in chimpanzees due to added nutrients from hunting of monkeys (and particularly, eating their brains, presumably for the fats), it might not require tougher than normal times to produce a significant evolutionary advantage.


Of course, that would depend on the specific scarce resource being carried.


Another driver might be carrying tools...





"If you aren't confused by quantum physics, you haven't really understood it."
― Niels Bohr

"As far as the laws of mathematics refer to reality, they are not certain, as far as they are certain, they do not refer to reality."
-- Albert Einstein

"If one is going to engage with the primordial forces of darkness, one must expect a bit of social awkwardness."
-- Penny Dreadful, season one, episode two
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6 years ago  ::  Mar 25, 2012 - 12:29PM #4
JRT
Posts: 341

Why do Humans Walk Upright?



It is to make it easier to change the lightbulbs.

the floggings will continue until morale improves
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6 years ago  ::  Mar 25, 2012 - 1:08PM #5
57
Posts: 28,191


Why do Humans Walk Upright?




Because God made them that way. 

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6 years ago  ::  Mar 25, 2012 - 1:46PM #6
d_p_m
Posts: 11,236

You two and your jokes... we're trying to have a serious discussion here!

"If you aren't confused by quantum physics, you haven't really understood it."
― Niels Bohr

"As far as the laws of mathematics refer to reality, they are not certain, as far as they are certain, they do not refer to reality."
-- Albert Einstein

"If one is going to engage with the primordial forces of darkness, one must expect a bit of social awkwardness."
-- Penny Dreadful, season one, episode two
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6 years ago  ::  Mar 25, 2012 - 2:21PM #7
Ken
Posts: 33,858

Mar 25, 2012 -- 1:08PM, 57 wrote:

Why do Humans Walk Upright?


Because God made them that way. 



If so, why did he begin with a perfectly good quadrupedal skeleton and tweak it in various ways to create a highly unsatisfactory bipedal skeleton? It would have made more sense to design a completely new and efficent bipedal skeleton from scratch. You are accusing God of incompetence, which is blasphemy. And according to all Christian denominations, blasphemy is a very serious - even the most serious - sin. You'd better change your tune if you don't want to burn in hell.

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6 years ago  ::  Mar 25, 2012 - 3:03PM #8
57
Posts: 28,191

Mar 25, 2012 -- 1:46PM, d_p_m wrote:


You two and your jokes... we're trying to have a serious discussion here!




I was serious.


The lack of fossils helps show evolutionism didn't happen.

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6 years ago  ::  Mar 25, 2012 - 3:10PM #9
57
Posts: 28,191

I've also noticed they presented the comic book version.


Standing on two legs allows them to carry much more at one time because it frees up their hands. Over time, intense bursts of bipedal activity may have led to anatomical changes that in turn became the subject of natural selection where competition for food or other resources was strong.


They never attempted to explain how the anatomical changes occurred....despite the lack og fossils, they assumed they did. 

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6 years ago  ::  Mar 25, 2012 - 3:17PM #10
Ken
Posts: 33,858

Mar 25, 2012 -- 3:03PM, 57 wrote:


Mar 25, 2012 -- 1:46PM, d_p_m wrote:


You two and your jokes... we're trying to have a serious discussion here!




I was serious.



Then you uttered a blasphemy against God.

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