Spirit Lake Upright Log Mat (Link)

Radioisotopes and the Age of the Earth - Part 1
Mihai Ursu
https://www.youtube.com/watch?v=l2tkOSZVvg4&t=317s

Note, not endorsing all of his* theology, but this video is about his science./HGL

PS, my own title refers to things he said before 9:00. After that, it is all about radioisotope dating, on which I did parallel work of my own./HGL

PPS, another link, to work of the speaker, Steven A. Austin:

ICR : RATE : Chapter 4 : Mineral Isochron Method Applied as a Test of the Assumptions of Radioisotope Dating
Steven A. Austin, Ph.D
https://static-www.icr.org/i/pdf/research/rate-all.pdf#page=109

Isochron is one I had problems clearing myself, I refer to Austin here./HGL

* Actually video owner Mihai Ursu is not the speaker, so his unqualified endorsement of Israel is not a problem with the content of Austin.