Human population growth
Robert T. Pennock quotes Henry and John Morris: “It is easy to show mathematically that, starting with just one man and one woman, it would take only about 1,100 years of exponential growth to produce the present world population of about six billion people, if the population were increasing by 2 percent each year. This cannot have been going on for very long in the past or the world would long ago have been overrun with people.” He then points out a fundamental flaw in that argument: they “are willing to assume for human population growth what they deny for radioisotopes and other physical processes, namely, that the relevant rates are constant.” One only needs a cursory knowledge of history to know that the growth rate of human populations is not constant. Elements like pandemics, epidemics, natural disasters and wars each play a role in lowering the growth of populations. Think of the Black Plague that wiped out a large percentage of the population, or WWII’s merciless genocide that killed millions of Jews. Using the Morris’ growth rate, Monroe worked out that there would have been only “eighty-six persons in the entire world in 1300 B.C., the time of the exodus, or 354 persons to witness the judgment at Babel,” which is not correct.
During the time of Darwin, many geologists and other scientists held the belief known as catastrophism. Catastrophism stated that the history of our planet is characterized by a number of catastrophes. The Flood of Noah would then be the most recent worldwide catastrophe. Georges Cuvier noticed that layers of rock contained fossils of animals which no longer exist and concluded that there were worldwide floods that wiped out all organisms and then the Creator started with a new creation, each time one that was more suitable for human life. In 1788 the Scottish geologist James Hutton found that rock formations are best explained by everyday natural occurrences such as wind and rain (thus: erosion) instead of catastrophism. He also stated that the age of the Earth is vast and his views began the movement that was later called uniformitarianism, which stood diametrically opposite catastrophism. Charles Lyell, a friend of Darwin, also opposed catastrophism and stated that geological features are a result of “the slow agency of existing causes,” and that “the present is the key to the past.”
Creationists argue that the entire fossil record was laid down during the Flood of Noah. The mineral deposits (gold, silver, semi-precious stones) were also formed during this time. There are numerous problems with these ideas regarding the Flood: The simpler organisms are in the bottom strata and more complex organisms are found only in higher strata. Noah did not take fish and other aquatic animals into the Ark, which means that these organism somehow survived the mixture of fresh and salt water which would have been inevitable with such a worldwide flood. Most fish die in a mixture like that. Then there are the problems with the rock layers themselves: some are tilted in odd angles and many sedimentary deposits are layered with volcanic ash between them. After the Flood, the rotting organism that drowned would have generated massive amounts of carbon dioxide and would probably have made the water unfit to drink and unfit for aquatic animals to live in. One pair of each species would not possess enough genetic variety to establish new populations and it does not explain why some kinds of organisms are only found in certain places or continents (eg. the marsupials and monotremes of Australia). The fossils of organisms that no longer exist spark questions as well. It has been claimed that these species either didn’t get onto the Ark or had fallen off and thus drowned in the Flood, which is quite absurd.
To explain where all the water for the Flood could have come from, proponents of creation science had to invent what is known as the “vapour canopy.” In a science text for high school students, Accelerated Christian Education teaches the following regarding the vapour canopy:
To understand the volcanic activity during the Flood, we must also understand the hydrologic cycle before the Flood. This water cycle seems to be the result of the waters being separated during Creation into the ‘waters above the firmament’ and the ‘waters under the firmament’ (Genesis 1:7).
The waters above the firmament formed a canopy of vapor that created a ‘greenhouse effect.’ This canopy, being vapor, was fully transparent, allowing the sun’s rays to shine through, but it contained vast quantities of water that trapped the sun’s heat reflected from Earth’s surface. This ‘greenhouse’ permitted warm temperatures, tropical vegetation, and abundant animal life in all parts of our Earth.
The waters under the firmament included seas, which were called ‘the great deep’ or ‘the great depths of water,’ and rivers. The rivers came from fountains or springs rather than from rainfall (Genesis 2:5, 6).
Seemingly, the source of the springs was subterranean reservoirs. All of the reservoirs could have been connected to each other, as well as to the surface seas, through a system of subterranean conduits. The heat energy for pressurizing the underground water came from deep within our Earth.
In order to explain why the more primitive species are found in lower layers, George McCready Price, John Whitcomb, Jr., and Henry Morris argued that the invertebrates (eg. snails, insects) would have been more helpless and thus buried first, while the more agile vertebrates (eg. antelope, birds) would have been able to outrun the waters and reach higher elevations.
Cotner and Moore point out some difficulties of this model:
For example, some mammals—perhaps crippled, sick, trapped, or recently deceased—would presumably have been unable to flee to higher ground, and would therefore have been trapped in the lower sediments. However, there are no mammals— not one —in the lower geologic strata. Similarly, there are no nonavian dinosaurs— not one —above the Cretaceous. Fossilized invertebrates occur in virtually all strata, and “dumb” animals such as marine clams and snails (that supposedly drowned in the early stages of the rising flood) are often found above “smarter, faster” reptiles and amphibians (and dinosaurs).
Another problem is that some animals that are found only in higher strata are not very agile and would not have been able to outrun flood waters. Examples of such animals are tortoises, sloths, koalas, and chameleons. New-born animals would have struggled as well and many nests of birds and reptiles would have been left to be covered by the water.
The Principle of Superposition, affirmed by Nicholaus Steno during the mid-1600’s, explains that strata are stacked in the order that they were laid down. In 1938 Harold Clark, a young-earth creationist, examined cores that were drilled by workers at oil fields in Texas and Oklahoma. He found that the strata lie in a much more definite sequence than thought and that Flood Geology “does not harmonize with the conditions in the field.”
Yet another problem for Flood Geology is that when water recedes, it leaves behind sediment consisting of mud and not, for example, shale (remember the Burgess shale spoken of in the previous post).
That’s it for now. In the next installment we’ll look at radiometric dating, which is going to get quite technical.
After that it’s time for the missing links and transitional forms to make their appearance.
Accelerated Christian Education 1998. Science 1086. sl: sn.
Cotner, S & Moore, R 2011. Arguing for evolution: An encyclopedia for understanding science. Greenwood: Santa Barbara.
Daintith, J & Martin, E (eds.) 2010. Oxford dictionary of science. Oxford: Oxford University Press.
Pennock, R T 2002. Tower of Babel: The evidence against the new creationism. Cambridge: MIT Press.
Rice, S A 2007. Encyclopedia of evolution. New York: Facts on File.