Tuesday Science – What is Evolution?

Since my blog’s readership as best as I can tell is about evenly spit between atheists and a few Christians who accept evolution and conservative Christians (mostly Adventists) who buy into the myth of Creationism. For 23 years I bought into the myth, so I understand how it can either be due to ignorance of the science or an existential denial of fact out of theological convenience. For me, 22 years were spent with the former excuse and one year was due to the latter.

So what is Evolution?

When non-biologists talk about biological evolution they often confuse two different aspects of the definition. On the one hand there is the question of whether or not modern organisms have evolved from older ancestral organisms or whether modern species are continuing to change over time. On the other hand there are questions about the mechanism of the observed changes… how did evolution occur? Biologists consider the existence of biological evolution to be a fact. It can be demonstrated today and the historical evidence for its occurrence in the past is overwhelming. However, biologists readily admit that they are less certain of the exact mechanism of evolution; there are several theories of the mechanism of evolution.

 For the rest of that article you can find it on Talk Origins.

For more check out this article also on Talk Origins (I’m reading through this one and it’s great).

7 Comments


  1. I know one story (imagination) of H.G.Wells. About 35 years ago when I was doing my first degree course in science, one of my senior colleague told me a story from Time Machine that a day will come when the size of humans would of size of a rat. Now see what has actually happened afterwards. About 2 or 3 years back I saw in a news paper that a giant sized rodent fossil had been found. This was almost to modern elephant size. This confirmed my belief that dinosaurs had not been wiped out. They are still found in smaller and smaller size, yes of course with some different characteristics. I think Gravitation Force is one of the major cause of genetic mutation. Gravitation Force is gradually increasing towards centre and compressing all members of animal kingdom bringing about genetic change with respect to size. A new evolved species or same species with some new characteristics created. I further believe that humans and dinosaurs co-existed. I know one evidence in support of this.


  2. So as for the giant rodent found a few years ago you can check out an article about it at New Scientist. It was about the size of a bull, not an elephant, and dates back 2 million years ago. If you check out fossils from animals before the mass extinction from the last ice age you will find that there were quite a few large species who were wiped out do to reduced resources and over competition. From what I gleaned from this article, while North and South America were separated South America had an explosion of rodent diversity, but the large ones died off once the continents were joined back together allowing for increased competition and predators.

    For a great refutation of humans and dinosaurs coexisting check out this article at Talk Origins.

    All I'm going to say to address the gravitation claim is that from time to time in history and in certain geographic areas animals increase in size as resources allow, when the resources don't allow then they die off. The only way that gravitation would be increasing is if the earth was increasing in mass.

    If you have any evidence to support your claims, then please post it.


  3. Nearly a third of Texans believe humans and dinosaurs roamed the earth at the same time, and more than half disagree with the theory that humans developed from earlier species of animals, according to the University of Texas/Texas Tribune Poll.

    The differences in beliefs about evolution and the length of time that living things have existed on earth are reflected in the political and religious preference of our respondents, who were asked four questions about biological history and God:

    • 38 percent said human beings developed over millions of years with God guiding the process and another 12 percent said that development happened without God having any part of the process. Another 38 percent agreed with the statement "God created human beings pretty much in their present form about 10,000 years ago."

    • Asked about the origin and development of life on earth without injecting humans into the discussion, and 53 percent said it evolved over time, "with a guiding hand from God." They were joined by 15 percent who agreed on the evolution part, but "with no guidance from God." About a fifth — 22 percent — said life has existed in its present form since the beginning of time.

    • Most of the Texans in the survey — 51 percent — disagree with the statement, "human beings, as we know them today, developed from earlier species of animals." Thirty-five percent agreed with that statement, and 15 percent said they don't know.

    • Did humans live at the same time as the dinosaurs? Three in ten Texas voters agree with that statement; 41 percent disagree, and 30 percent don't know.


  4. Are you suggesting that polling data about popular opinion is a gauge of scientific fact?


  5. Nearly a third of Texans believe humans and dinosaurs roamed the earth at the same time, and more than half disagree with the theory that humans developed from earlier species of animals, according to the University of Texas/Texas Tribune Poll.

    The differences in beliefs about evolution and the length of time that living things have existed on earth are reflected in the political and religious preference of our respondents, who were asked four questions about biological history and God:

    • 38 percent said human beings developed over millions of years with God guiding the process and another 12 percent said that development happened without God having any part of the process. Another 38 percent agreed with the statement "God created human beings pretty much in their present form about 10,000 years ago."

    • Asked about the origin and development of life on earth without injecting humans into the discussion, and 53 percent said it evolved over time, "with a guiding hand from God." They were joined by 15 percent who agreed on the evolution part, but "with no guidance from God." About a fifth — 22 percent — said life has existed in its present form since the beginning of time.

    • Most of the Texans in the survey — 51 percent — disagree with the statement, "human beings, as we know them today, developed from earlier species of animals." Thirty-five percent agreed with that statement, and 15 percent said they don't know.

    • Did humans live at the same time as the dinosaurs? Three in ten Texas voters agree with that statement; 41 percent disagree, and 30 percent don't know.


  6. Are you suggesting that polling data about popular opinion is a gauge of scientific fact?


  7. Nearly a third of Texans believe humans and dinosaurs roamed the earth at the same time, and more than half disagree with the theory that humans developed from earlier species of animals, according to the University of Texas/Texas Tribune Poll.

    The differences in beliefs about evolution and the length of time that living things have existed on earth are reflected in the political and religious preference of our respondents, who were asked four questions about biological history and God:

    • 38 percent said human beings developed over millions of years with God guiding the process and another 12 percent said that development happened without God having any part of the process. Another 38 percent agreed with the statement "God created human beings pretty much in their present form about 10,000 years ago."

    • Asked about the origin and development of life on earth without injecting humans into the discussion, and 53 percent said it evolved over time, "with a guiding hand from God." They were joined by 15 percent who agreed on the evolution part, but "with no guidance from God." About a fifth — 22 percent — said life has existed in its present form since the beginning of time.

    • Most of the Texans in the survey — 51 percent — disagree with the statement, "human beings, as we know them today, developed from earlier species of animals." Thirty-five percent agreed with that statement, and 15 percent said they don't know.

    • Did humans live at the same time as the dinosaurs? Three in ten Texas voters agree with that statement; 41 percent disagree, and 30 percent don't know.

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