Part I mentioned helium retention in zircons and young carbon 14 dates as evidences for a recent creation and for an acceleration of decay rates in the past. Such an increase in decay rates should have more of an effect on ages computed from isotopes with long half-lives than elements with short half-lives.
If you add millions of years to the Bible, this is what you get.
I once heard a radio show host ask a caller, if it could be proven beyond the shadow of a doubt that the Bible wasn't true and that Jesus wasn't who he claimed he was, if the caller would be willing to accept that information. I remember thinking that I would like to ask the host the same question, turned around, if it could be proven, beyond the shadow of a doubt, that Jesus really was who he claimed to be, would you accept that? Are we willing to believe the evidence? Or do we resist truth or new ideas because of preconceived notions, traditions, or dogma? I see no problem with evidence and the truth. It certainly beats lies.
One scientific challenge young earth creationists have had to address is the starlight-time question.
From NASA: Binary spiral galaxies NGC 2207 (left) and IC 2163 (right) are estimated to be 114 million light years away from Earth
Toxicologists like myself make a living out of evaluating the impact of chemical exposures and other insults on the health of laboratory animals (we can't test humans after all). Rats and mice, members of the evolutionary order Rodentia, make up a large majority of these experimental animals. Ken Boschert, a veterinarian with Washington University's division of comparative medicine and the operator of a Web site called Net Vet (netvet.wustl.edu/) estimates that 99 percent of experimental animals nowadays are rats and mice, which are small, cheap to feed, and reproduce quickly. Rats and mice are also believed to share a closer evolutionary lineage to humans than other non-primate mammals.