On Culture and Genetics, Horses and Wagon
If I told you once, I told you a million times:
Itâ€™s The Horses Pulling, Not The Wagon Pushing
Lasting Evolutionary Change Takes About One Million Years
â€œThe exact cause of these long-term, persistent evolutionary
changes is not certain.â€쳌
Getting Inside the Mind (and Up the Nose) of Our Ancient
http://www.sciencedaily.com/re...Â Â Â
â€œ"This is the first real evidence for the steps that
led to the evolutionary origin of jawed vertebrates.â€쳌
by dovhenis on
March 24, 2011
Nov 12 2009 (http://www.the-scientist.com/c...
"Aping the Stone Age"
join artifact extractors to probe the roots of stone tools:
lines of evidence indicate that wild chimps indeed invent distinctive types of
tools within communities, and these tools get passed from one generation to the
next as a kind of cultural legacy.
50,000 generations, Oldowan toolmaking techniques got passed from hominid experts
to novices. In recent experiments, it was found that captive chimps display a
similar capacity for learning how to use tools by observing more experienced
One of the
projects combines chimp, hominid and modern human data to explore the enduring
mystery of why most people are right-handed. Judging by stone tools, by at
least 120,000 years ago right-handedness frequently occurred among Neandertals,
and archaeological record from ancient Homo sapiens that lived during the same
time as Neandertals shows similar signs of a right-handed skew. Most Oldowan
toolmakers from nearly 2 million years ago were probably right-handed. However,
whereas wild chimp communities display a variety of hand preferences, a trend
of relatively stronger right- and left-handedness does appear in chimp groups
that regularly use tools, such as nut-cracking stones or sticks for poking into
termite mounds to remove the edible insects.
suspect that "specific genes contribute to human hand preferences".
Uomini hypothesizes that people and chimps share a genetic propensity to use
one hand more than another on tasks that demand dexterity. Genes for
right-handedness, though, have evolved in humans alone, she proposes.
it is culture that drives genetic changes, NOT genetics that drives cultural
genes contribute to human hand preferences"? Read this above abstract
again and again. Note: First comes culture. Genetics follows culture. Genes
propagate in an expression conformation that maintains their evolved energy
constraint level. If/when their higher stratum take-off organism attains an enhanced
level of energy constraint the genes modify their expressions accordingly. This
is the drive and direction of life's evolution. This is how the horses are
harnessed, to the front of the wagon, not to the rear.
C. And also
adnauseam, right-handedness is NOT an enduring mystery
Just as life's
chirality was the best energy-constraining product of the early organisms,
direct sun-energy fueled independent RNA genes, and therefore it was selected to
survive, so a preferred-tools-handedness proved energetically advantageous, and
since it happened to start with right-handedness it has been since then
inducing genetic expression adjustment. And since humans, and even primates,
are just fresh young novel organisms on Earth, the process is still going on,
not yet completed. Just wait and see. When you return to Earth one-two million
years from now you'll hardly find any left-handed people.
The 22nd Century)