It is impossible to give an evolutionary sequence to the human fossils because there is a coverage gap involving the dating methods which evolutionists believe are the most reliable—radiocarbon and potassium-argon (K-Ar).This gap is from about 40,000 ya (years ago) to about 200,000 ya on the evolutionist's time scale.Twenty-eight of them (44%) fall within this time gap.Nineteen of the 222 Homo erectus fossil individuals (9% of the total) likewise fall into this time gap.Since the morphology of a fossil cannot be changed, it is obvious that the dating is the more subjective element of the two items.Yet, accurate dating of fossils is so essential that the scientific respectability of evolution is contingent upon fossils having appropriate dates.(Anatomically modern Homo sapiens fossils that are dated more recently than 40,000 years of age are not of great significance for evolutionary purposes and are not under consideration here.) There are four Neanderthal fossil individuals that are dated more recently than 40,000 years.
A method is described based on a proposed mechanism of uranium uptake and fixation derived from present understanding of the biochemistry of fossilizing bones and the geochemistry of uranium.All other Neanderthal remains, some 300 fossil individuals, or approximately 98.6% of all of the Neanderthals, fall into the period covered by this gap.(It is well known that another reason why many of the Neanderthal fossils are poorly dated is because they were found long before the importance of documenting fossils in their geological context was fully appreciated.) The relatively new fossil category created by evolutionists, the "archaic Homo sapiens" category, contains at least 64 fossil individuals.This problem period may be even larger because: (1) some dating authorities believe that the effective range for K-Ar doesn't begin until about 400,000 ya, and (2) many of the older fossils are found at sites that lack the volcanic rocks necessary for K-Ar dating and hence cannot be dated by this method at all.Although young-earth creationists challenge the legitimacy of all of the dates obtained by the long-term radiometric methods, even evolutionists are beginning to admit that this dating gap presents a problem for them.This new method, announced in the journal, Science, involves racemization of amino acids in ostrich eggshell.