Monkeys cant pronate & intnt is an evolutionary aphrodes


#1

Hired guns got me thinking…

After a keyword search I stumbled upon this article that I thought was pretty interesting, well actually a couple of articles and videos.

Does this shed light on the pronation mystery? Paul, your thoughts?

"Was intent the “Sex Panther” of its day? Worked 60% of the time, every time? (Anchorman)

http://www.ncbs.res.in/mvlab/files/Roach2013.pdf

[i]
Finally, it is possible that throwing instead evolved in the context of providing a
selective advantage during aggression. Numerous ethnographic and historical accounts
document the importance of throwing during intergroup conflicts
45

62
, and occasionally
between members of the same group
54,63

66
. Throwing proficiency could have enabled
better throwing groups to monopolize desirable resources or provided good throwing
males an advantage over weaker throwers in gaining access to reproductive opportunities.
Although we do not discount the potential selective advantage throwing may have
conferred in male aggression, there are several reasons to believe that the selective
benefit of throwing during hunting was more important. First, the evidence for high-
speed throwing first appears in
H. erectus
, a species that exhibits a marked reduction in
sexual body size dimorphism compared to earlier hominins
67

70
. Such a reduction in
dimorphism may represent reduced male-male aggression (or a shift to projectile aided
aggression), but appears to be driven more by increases in female body size
67,68,71
suggesting a shift in dietary quality or food availability at this
time
71

73
. The increased
inclusion of meat into the diet could explain this shift in female body size. Further,
animal carcasses represent high-quality, monopolizable resources that can be shared or
traded
74

76
. Such a shift in food economy has been suggested to increase cooperation,
likely resulting in reduced aggression
73,77
. Therefore, while thrown projectiles are used
during male-male and intergroup aggression, we propose that such usage is likely exapted
and that selection for throwing in order to hunt/scavenge is better supported by multiple
lines of evidence. [/i][/i]

Finally, it is possible that throwing instead evolved in the context of providing a
selective advantage during aggression. Numerous ethnographic and historical accounts
document the importance of throwing during intergroup conflicts
45

62
, and occasionally
between members of the same group
54,63

66
. Throwing proficiency could have enabled
better throwing groups to monopolize desirable resources or provided good throwing
males an advantage over weaker throwers in gaining access to reproductive opportunities.
Although we do not discount the potential selective advantage throwing may have
conferred in male aggression, there are several reasons to believe that the selective
benefit of throwing during hunting was more important. First, the evidence for high-
speed throwing first appears in
H. erectus
, a species that exhibits a marked reduction in
sexual body size dimorphism compared to earlier hominins
67

70
. Such a reduction in
dimorphism may represent reduced male-male aggression (or a shift to projectile aided
aggression), but appears to be driven more by increases in female body size
67,68,71
suggesting a shift in dietary quality or food availability at this
time
71

73
. The increased
inclusion of meat into the diet could explain this shift in female body size. Further,
animal carcasses represent high-quality, monopolizable resources that can be shared or
traded
74

76
. Such a shift in food economy has been suggested to increase cooperation,
likely resulting in reduced aggression
73,77
. Therefore, while thrown projectiles are used
during male-male and intergroup aggression, we propose that such usage is likely exapted
and that selection for throwing in order to hunt/scavenge is better supported by multiple
lines of evidence.[youtube]


#2

thinktank.

Thanks for the fascinating info…. will work through it and reply in greater length with time. There is evidence that our ability to throw was instrumental in migrating out of Africa and eventually distinguishing us from Neanderthals.

More Articles

[quote]“The linchpin is really what’s going on with the shoulder,” Roach said. “When you see the shift from a chimpanzee shoulder to a more relaxed human-like shoulder, that enables this massive energy storage. Many of the evolutionary changes we studied, whether in the torso or the wrist, may predate Homo erectus, but when we see that final change in the shoulder, that’s what brings it all together.”
[/quote]
Read more at: http://phys.org/news/2013-06-chimps-humans-baseball-pitcher.html#jCp

PDF
Complex Projectile Technology and Homo sapiens Dispersal into Western Eurasia

http://paleoanthro.reedd.webfactional.com/static/journal/content/PA20100100.pdf

What began as a skill used to put meat in our belly, is now a skill we are willing to pay teenagers millions of dollars to perform. Lest one doubt our commitment, observe the willingness to replace damaged ligaments with healthy ones while perfecting the surgical techniques necessary to sustain the process.

All this while pretending to be a highly evolved, sane and enlightened species… :lol: :lol: