Thursday, December 07, 2006
Evolution Websites Try to Explain Heart/Eye Evolution
The following is text from scientific evolution websites http://www.naturalhistorymag.com/features/0400_feature1.html regarding heart and eye evolution: (My comments in italics.)
Quote: They’ve also discovered that the change from simple tube to complex, chambered organ may have happened in an evolutionary flash. (Discovered that it may have?? Then they didn't discover.)
The first foreshadowings of the heart reach back to at least 800 million years ago, when the first known multicellular fossils formed.
Genes also provide a hint as to where that first protoheart might have come from: the throat. (What is a protoheart? Please include a drawing. And, the throat?? Great guess!)
So here’s a possible scenario for how the first heart evolved. Every now and then during cell division and reproduction, one gene (or, rarely, a group of genes) is accidentally duplicated. Perhaps this happened to the genes that induced throat formation in a lineage of primitive animals. At first, the second set of throat genes may have kept on doing their original job of helping to build the throat. Then, thanks to a mutation, (WOW! That must have been some mutation!) the genes started switching on in cells in a different part of the animal’s body. Instead of making a muscular tube that pumped food, (perhaps) these genes began to make a muscular tube that pumped blood. (I wonder where they got the blood to pump.....from the Red Cross?)
Keeping hard-working hearts supplied with oxygen may have been the initial pressure behind the evolution of lungs 400 million years ago. (Double WOW!) Unquote.
Quote: Darwin proposed that complex eyes could have been formed with a succession of photosensitive organs, each a bit more complex than its predecessor and each favored by natural selection because of the advantages that the possessor received. (What advantages are there in a blind eye?) Visualizing such a process would be easiest if steps in this sequence were preserved in closely related living organisms; but no such sequence exists*** (See *** below. Who is lying?) for eyes because the intermediate stages have been lost through extinction. Unquote.
(A sorry excuse. No wonder creationists out debate the evolutionists. The intermediate stages don't exist as fossils because they never existed as animals. The stages of eye evolution should show up as indents in the skulls of fossils which gradually grow into eye sockets over hundreds of thousands of years. Of course this evidence, which should be plentiful, is non-existent.)
http://library.thinkquest.org/C003758/Development/heart_evolution.htm explains heart evolution by describing hearts that already function, but are "simpler". What about the steps from nothing to a functioning heart? What did they look like, and why did they even occur since a "proto-heart" would be useless? Evolutionists usually ignore this part of the evolution of the heart, and start their explanation with single-chambered hearts. This is an embarrassment to real science. The next part had something to do with flying reindeer and Santa Claus. "The reindeer sprouted wings and off they flew.................." No matter what the subject is in Darwinian evolution, assumptions are piled upon figments of imagination, until a whole fake science has been established, and believed by enough people to make it seem real. Then evolution "scientists" all pat each other on the back and agree that it is real, and anyone who questions is a fool. A great example of group psychology.
I have since found that creationists (again, this site has nothing to do with creationism) have the same challenge for Darwinism: that hearts and other organs cannot possibly evolve, because there are no possible intermediate steps to that evolution. What I thought about independently had already been on the books.
Try http://www.pbs.org/wgbh/evolution/library/01/1/l_011_01.html for a real visit to Alice in Wonderland.
Quote: Here's how some scientists think some eyes may have evolved: The simple light-sensitive spot (What exactly is a "light-sensitive spot"?) on the skin of some ancestral creature gave it some tiny survival advantage, (What advantage, since it would still be totally blind?) perhaps allowing it to evade a predator. Random changes then created
(Watch out! "Created" is a bad word for evolutionists!) a depression in the light-sensitive patch, a deepening pit that made "vision" a little sharper. At the same time, the pit's opening gradually narrowed, so light entered through a small aperture, like a pinhole camera. (Wow! Now this is real scientific imagining!)
Every change had to confer a survival advantage, no matter how slight. (What change could possibly be an advantage, since a "proto-eye" would be something like a tumor?) Eventually, the light-sensitive spot evolved into a retina, (Wow again!) the layer of cells and pigment at the back of the human eye. Over time a lens formed at the front of the eye. (Triple WOW!) It could have arisen as a double-layered transparent tissue containing increasing amounts of liquid that gave it the convex curvature of the human eye.
In fact, eyes corresponding to every stage in this sequence have been found in existing living species.*** (Complete poppycock. The eyes of some species are "simpler", but still extremely complex, with nerve connection to a brain. Limpet, and Murex are examples. Also, see *** above for a major contradiction. ) The existence of this range of less complex light-sensitive structures supports scientists' hypotheses about how complex eyes like ours could evolve. The first animals with anything resembling an eye lived about 550 million years ago. And, according to one scientist's calculations, only 364,000 years would have been needed for a camera-like eye to evolve from a light-sensitive patch. Unquote
(Could I please see his calculations? I bet they would really be interesting and scientific!)