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Location: UFOUpDatesList.Com > 2012 > Dec > Dec 18

Re: Convergent Evolution

From: David Rudiak <drudiak.nul>
Date: Mon, 17 Dec 2012 12:01:04 -0800
Archived: Tue, 18 Dec 2012 07:10:00 -0500
Subject: Re: Convergent Evolution


>From: Edward Gehrman<egehrman.nul>
>To:<post.nul>
>Date: Sun, 16 Dec 2012 12:55:58 -0800
>Subject: Convergent Evolution

>List,

>This is an interesting article on convergent evolution. Humans
>occupy the "tool making and using" niche. That means that
>another species that opted to travel along the tool-making path
>would end up looking very much like humans.

>http://tinyurl.com/cw8x3br

>"However, when University of Queensland researcher Bryan Fry and
>colleagues tested the serpentine DNA, the results showed that
>they were separate species, and not even close relatives... This
>is a case of convergent evolution, wherein different species
>evolve independently but end up looking quite similar... Or, as
>Yong put it, convergent evolution is 'when different species
>turn up at life's party wearing the same clothes'."

Ed, the article is about convergent evolution of two species of
sea snakes, not about tool making species.

While I would agree that a good case could be made that
technological, space-faring, non-human beings of very separate
evolution might very well be humanoid in appearance, including
hands, for convergent evolutionary reasons, you are making a
huge extrapolation to that from an article on sea snakes.

My favorite examples of convergent evolution are ancient
reptilian ichthyosaurs and modern mammalian dolphins, which
evolved 150 million years apart, yet occupied the same
ecological niche (ocean predators) and have an extraordinary
similar appearance. The similarities go beyond that, including
both giving birth to live young and being land animals that
returned to the sea. I recently visited Ichthyosaur State Park
in the middle of Nevada located at 7000 feet elevation, which
has a hillside of exposed ichythosaur skeletons, some up to 70
feet long. I asked the guide how they could end up in central
Nevada, and he responded that 200 million years ago central
Nevada was the western edge of the super continent of Laurasia
before North America split off from Europe/Asia. In the
intervening 200 million years, California and western Nevada
"accumulated" on the western edge of North America where
ichythosaurs once frolicked in the shores of the ancient Pacific
Ocean.

All of this is very mind-blowing. I think we all have trouble
grasping these vast expanses of time and the great changes that
can happen in such time expanses. And this represents less than
5% of the history of Earth.


David Rudiak



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