So ok. I guess too many of us have read Sunday School textbooks detailing all the flaws of Natural Selection, and how it could never have happened. I've seen quite a few books like that myself, which amazes me because we are practically surrounded by evidence to the contrary: that Evolution is for real, and it's happening even as we speak!
Want some examples? Here we go:
1) viruses and bacteria constantly adapting to antibiotics.
2) your own immune system constantly adapting to new pathogens.
3) pests evolving resistance to pesticides.
4) hybrid plants appearing through cross-pollination.
5) mutant animals being born in all species, all over the globe. Ever met a person with 6 fingers on each hand? I have! Plus, what do you think is the cause of the majority of miscarreages?
6) genetic diseases/disorders/deletions/misconfigurations passed on from generation to generation along family lines.
7) increase in dominant genetic aberrations as a result of inbreeding.
8) artificial evolution, in the form of breeding. Ever considered where all the different kinds of dogs came from? Cows? Horses? Cats? Now, how could a Chihuahua and a German Shepherd possibly have a common ancestor? Any suggestions?!
9) An isolated village in Mediterranean consists of people incapable of getting high levels of blood cholesterol. They are so isolated, they can all practically trace their origins back to a single family. They have 'evolved' resistance to high-fat diet, and suffer no increased risk of heart attack even if they feed solely on 100% lard. Currently, active research is being done on them to see how their bodies solved the problem, and whether the solution is applicable to other less fortunate ones.
10) Genetic diversity is everywhere. Humans, being among some of the least genetically diverse species, are nevertheless staggeringly different from one another.
11) Thousands of American Indians were wiped out by chickenpox -- a disease Europeans were highly resistant to. Why do you think that was?
Ok, enough with examples; I'm never going to list all of them, though I'm sure others will add to the list. On to the next issue:
The entropy arguments. I've heard way too many people reason that the universe should progress toward chaos, not order -- and therefore the growing complexity of biological systems due to evolution is contrary to the laws of thermodynamics. Wrong!!! Such arguments arise because of lack of understanding of the very physical laws people call to their support.
Let me assure you, that even as the biological systems get more complex, the amount of disorder in the universe grows. Complexity always grows at the price of increased disorder overall. For example, liquid water vapor can form intricate ice patterns on windows in winter, but only at the cost of radiating its heat away -- thus adding to the entropy of the universe. The various biological molecules only can combine and recombine given net energy input; the Sun is the main provider of this energy. And ultimately, the complexity is destroyed anyway and radiated away as heat. Yes, we are complex -- but only at the cost of profusely increasing the universe's entropy.
You know why complex biological systems don't degrade toward simpler ones? The answer is surprisingly simple, if only you actually paid attention to your biology teacher -- survival of the fittest!!! The whole point of the growing biological complexity lies in abilities to withstand environmental shocks, successfully obtain food (energy), successfully reproduce, escape predators, and adapt to changes in the environment. Guess how intelligence evolved? It's eat, and try not to be eaten.
It astonishes me to hear people question dating techniques, and the fact that the Earth is 4.5 billion years old. Hey geniuses, have you ever bothered to check into the actual physics involved? It's really not all that complicated! Do you realize that carbon dating is not the only technique used, and that multiple, varied approaches all converge on the same result? Or maybe we should just ignore the work of scientists over the past few centuries, and prefer to take on faith what the Holy Bible teaches us about the natural world?! Can you say, "denial"?
The 'missing link' arguments. Lamest excuses for an argument out there. Just because something hasn't been found yet, doesn't mean it never existed! May I remind you that fossilization is not a deliberate process, that we are lucky to even have what we do have? But even given the currently 'spotty' record of how species changed over time, I think the dots simply beg to be connected! Grab a popular paleobiology book, and take a look at just the skeletal morphology similarities -- you'll be amazed!
But evidence for evolution is not just in the fossils. All life on earth uses the same fundamental molecule: DNA. Sound strange to anybody? Or how about the fact that all life on earth possesses mitochondria in its cells? Ever pondered the question of why human DNA is 98% the same as that of chimps? Ever wondered why we look and function so much like chimps? Ever wondered why the sensors in your ears and eyes are bathed in liquid? Ever taken a look at the amazing structural similarity between the brain of a rat and a human? Why all plants and all animals use sugar-based energy storage, and operate with ATP and ADP as energy containers?
Ever considered the vastness of the evolutionary 'laboratory'? I've heard complaints that such a marvelous thing as a human being couldn't possibly evolve so quickly. Billions. As in thousands, of thousands, of thousands of years! Over the entire surface of planet Earth! A mile into the sky, and several miles underground! These are the dimensions of the evolutionary experiment. And it's not random; by all means no. It's a *directed* random search, where bad variants are discarded immediately, and only the best and most viable are kept for the next generation. Countless generations. Countless individuals. Spread out over vast territories. And every single one, born and unborn alike, a separate toss of the dies. As agents of evolution, we have random mutations, cross-breeding, infections, and selective breeding. Yes, selective breeding -- as in when females prefer only a certain kind of male and vice versa. Nobody to supervise -- just a species pruning its own genetic tree.
How did it all begin? How could such complex biomolecules arise out of nothing? This, in my opinion, is the only worthwhile challenge to evolution. Anything else is basically ignorance of the theory and its underpinnings. But even if we don't know how exactly it got started, the picture of how it progressed is crystal clear.
So, how did it all start? That's the cutting edge of biochemical research. We already have evidence of amino acids forming spontaneously in all sorts of situations. We also have experiments showing how primitive 'cell walls' form in suspensions of lipids. I'm not a biochemist, so I don't keep up with all the latest and most exciting breakthroughs. But I'm sure someone here with more biology/chemistry background will be able to supply a better view of this issue.
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Now, let me ask you all another question. Given the abundant, multidisciplinary, ever-growing evidence for evolution, what do you have to say for creationism? How can you possibly find it more convincing than evolution? Or has there been recent evidence for the fact that women are indeed created out of a man's rib? Or maybe you could explain to me the lack of intelligence when it comes to the design of biological systems? Wherefore genetic diseases? Why does a developing human embryo first look like a fish, then like a lizard? Why do humans have vestiges of a tail at the end of our spinal column? Why do we not all have dark black skin, since it's obviously advantageous against the sun? Why do we still have hair over our bodies, when it definitely no longer serves any useful purpose? Why are our brains wired up in such a haphazard and disorganized manner? Why are women's pelvises so narrow, causing such great pain and risk during birth? What's the appendix for? Why are we forced to consume other lifeforms for energy, rather than just generating energy from light like the plants do? What's the point of sleep? And so on, and so forth.
May I also remind the local zealots, that their highest authority when it comes to interpreting the bible -- the Pope himself -- has conceeded that evolution is for real. Though I realize that a lot of you don't succumb to authority (except when it comes to Bible) -- and spin your own interpretations. Just thought I'd mention the fact though.
Now, since you're all so convinced that evolution has failed, let's hear some replies. I just can't wait...
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I am; therefore I think.
[This message has been edited by Boris (edited May 30, 1999).]