It is insanity to belive that they are all contaminated with exactly the right amount of all of those elements.
That the article and it's presentation illustrates bias is not in question. Who's bias is being illustated apparently is.
Those not considered contaminated....?
Gregory Brennecka of Arizona State University and colleagues measured the relative amounts of Uranium 238 to Uranium 235 from several samples taken from the large Allende meteorite, named for the village in Mexico near where it landed in 1969. With the more sensitive instrument, they detected small differences in isotope ratios from different inclusions within the same meteorite.1 Isotopes are versions of an element with differing nuclear components. The full technical report appeared in the January 22, 2010, issue of the journal Science.
The differing amounts of material that were found in separate samplings of the same meteorite were unexpected. The current standard age assigned to the solar system of 4.6 billion years was determined by studying the Uranium-to-Lead decay systems in meteorites, which are assumed to have formed before the planets did. This age was based on the belief that the rate of decay has been constant, and that Uranium 238 will be present in a known ratio to Uranium 235. The varying quantities of these isotopes call into question the calculated age of the solar system, since “one of the equation’s assumptions — that certain kinds of uranium always appear in the same relative quantities in meteorites — is wrong.”
“This variation implies substantial uncertainties in the ages previously determined by Pb-Pb [lead-lead] dating of CAIs,” Brennecka stated in an ASU press release.3 CAIs are “calcium-aluminum-rich inclusions” found in the meteorite. Though the measurements of these elements are very precise, the assumptions upon which their usefulness as a clock rests are questionable at best. In a Wired Science article on Brennecka’s findings, Gerald Wasserburg, emeritus professor of geology at Caltech, commented, “Everybody was sitting on this two-legged stool claiming it was very stable, but it turns out it’s not.”
Grossman, L. Age of Solar System Needs to Be Recalculated. Wired Science. Posted on wired.com January 4, 2010, accessed January 12, 2010.
Brian Thomas, Institute for Creation Research, January 21, 2010