Dating of fossils evolution
All these results have been reported in the conventional scientific literature. Pieces of fossilized wood in Oligocene, Eocene, Creta- ceous, Jurassic, Triassic, and Permian rock layers supposedly 32–250 million years old all contain meas- urable radiocarbon, equivalent to “ages” of 20,700 to 44,700 years. Similarly, carefully sampled pieces of coal from ten U. coal beds, ranging from Eocene to Pennsylvanian and supposedly 40–320 million years old, all contained similar radiocarbon levels equivalent to “ages” of 48,000 to 50,000 years.
Even fossilized ammonite shells found alongside fossilized wood in a Cretaceous layer, supposedly 112–120 million years old, contained measurable radiocarbon equivalent to “ages” of 36,400 to 48,710 years.
The half-life of C14 is 5730 years, although there are subtleties about how C14 ages are actually computed.
That means that in 5730 years, half of the C14 will decay to nitrogen 14.
Perhaps there was less C14 produced in the past, which would imply that even the relatively young C14 dates are too old. The C14/C12 ratio of living things and organic matter on the surface of the earth is about the same as in the atmosphere because carbon is constantly exchanged between living things and the atmosphere.
After an organism dies, if it is buried and left undisturbed, the C14 in it gradually decays into nitrogen 14. Thus the ratio of C 14 to C12 in the remains of the organism gradually decreases with time.
Theodosius Dobzhansky, a geneticist whose work influenced 20th century research on evolutionary theory, said, "Nothing in biology makes sense, except in light of evolution." This quote emphasizes the role of evolution as the most important unifying principle in biology.
Living things might, at first, seem very diverse, but closer inspection reveals a surprising unity.
Anatomists Evidence Supporting Biological Evolution (see "Common Structures") How Scientists Study Evolution (search for "Evolution," click on "How Scientists Study Evolution," and look for "Anatomical Similarities") What Is Morphology and Why Is It Important?New evidence for evolution is being discovered every day.No evidence has been found which cannot be explained by evolution.This unity, or common ancestry, can be explained by evolutionary theory.With such an important theory at stake, it is essential to understand the evidence upon which it is based.
In three half-lives the C14 concentration decreases by a factor of 8.