“In a recent
study, University of Minnesota biologist Emilie C. Snell-Rood found evidence
suggesting that our direct changes to the natural habitats of animals (through
technologies advances, antibiotics and revised food pyramids) have caused some
animals to evolve with bigger brains. Dr. Snell-Rood studied dozens of
individual animal skulls, some as old as a century, from ten different species
including bats, gophers and mice. In two of the species, the white-footed mouse
and the meadow role, the brains of the animals plucked from metropolitan areas
or suburbs were about 6% bigger than those of the animals taken from farms or
other rural areas. Dr. Snell-Rood's hypothesis after assessing the first wave
of results was that brains become significantly bigger when they move to cities
or bustling towns, where the animals must learn to find food in places that
they're not biologically trained to encounter or expect.”
Again this
is not an example of evolution, but another example of selective breeding. None of these critters in the study evolved
into another species, rather like we breed the miniature horse by choosing
which horse to breed with each horse to get the desired results. In this case the selective breading was
forced indirectly upon the animals by humans instead of directly. If you want to call this an example of
evolution you have to call what breeders of all livestock, dogs, and cats do
also an example of evolution.
I truly do
not think that these biologist knows what the difference in evolution and
selective breeding is. Regardless of
where man is forcing the selection or nature unless and until a new species
comes into being it cannot be claimed to be an example of evolution.
Just as we
breed horses and dogs to have smaller and then bigger heads, to be stronger or
weaker, fasted or slower, so can change in wild animal's habitat by killing off
the less adaptable, and forcing the remainder to breed with what is available
to breed with, and pass on the charistics of the survivor. This is in principle
what the breeder is doing when he culls his stock of undesirable
charistics. If you are going to claim
one is evolution then you have to let the other have the same designation.
In a paper
published Oct. 28, 2013, in the journal Proceedings of the National Academy of
Sciences, Isbell; Hisao Nishijo and Quan Van Le at Toyama University, Japan;
and Rafael Maior and Carlos Tomaz at the University of Brasilia, Brazil; and
colleagues show that there are specific nerve cells in the brains of rhesus
macaque monkeys that respond to images of snakes. From the report: “The snake-sensitive neurons
were more numerous, and responded more strongly and rapidly, than other nerve
cells that fired in response to images of macaque faces or hands, or to
geometric shapes. Isbell said she was surprised that more neurons responded to
snakes than to faces, given that primates are highly social animals.”
Isbell
originally published her hypothesis in 2006, following up with a book, The
Fruit, the Tree and the Serpent (Harvard University Press, 2009) in which she
argued that our primate ancestors evolved good, close-range vision primarily to
spot and avoid dangerous snakes. If Isbell
really said this then she does not understand the Theory of Evolution at
all. I read stuff like this all the
time, “…ancestors evolved good, close-range vision primarily to spot and
avoid…” or “garaffs evolve long neck to eat the top of trees” or "The
common ancestors of all primates evolved an opposable thumb so they could grasp
branches." These are all Back
Assward.
If evolution
works it is haphazard without purpose or plan.
If it is planed what it is doing then it is a substituted for God.
When she "... argued that our primate ancestors evolved good,
close-range vision primarily to spot and avoid dangerous snakes.". Her words are saying that evolution planed
this and executed it.
There can be
no reason for evolution to do anything, not to allow our ancestors to see
snakes, or have to have a grasping hand.
What she has done is to find, "The snake-sensitive neurons were more
numerous, and responded more strongly and rapidly, than other nerve cells that
fired in response to images of macaque faces or hands, or to geometric shapes.
Isbell said she was surprised that more neurons responded to snakes than to
faces, given that primates are highly social animals." And then assume that was something that
evolution had done.
Had
evolution did it, it would not be so that they could see snakes, rather because the ones who
snakes better lived to make more babies that the one's who did not pick them
out so fast, and their babies past the trate on down to their babies. Isbell, et al, created a story to explain why
the rhesus Macaque monkeys' sensitive neurons fired up more for images of
snakes than it did for monkeys. It's a
good story if you believe in evolution.
Now to prove it she needs to show the same response in other primates,
and also show that the primates' don't fire off the same "sensitive
neurons" for other scary things.
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