There is incontrovertible evidence from lead-isotopic data that meteorites are approximately 4.55 ± 0.02 Ga. We can presume, as the evidence indicate… - Brent Dalrymple

I was not overly enthusiastic about appearing in court. The goal of both the courts and science is to discover the truth, but the methods of the two are so different that it is difficult for most scientists to enter the legal arena with any degree of confidence. Finally, there was a natural reluctance, common to most scientists, to spend any time dealing with nonsense; the tenets of “scientific” creationism are so absurd that it seems most appropriate simply to ignore them.

Biblical chronologies are historically important, but their credibility began to erode in the eighteenth and nineteenth centuries when it became apparent to some that it would be more profitable to seek a realistic age for the Earth through observation of nature than through a literal interpretation of parables. Today, scientists and biblical scholars alike agree that science is the proper arena in which to seek the numerical age of the Earth.

The creationist “scientific” arguments for a young Earth are absurd, I and other authors have dealt with them at length elsewhere, and they do not merit further attention here.