At first I was a bit confused why this was a big deal given that Cosmogenic Radionuclide Dating[1] (which is based on cosmic rays) has been a thing for a while.

At first I was a bit confused why this was a big deal given that Cosmogenic Radionuclide Dating[1] (which is based on cosmic rays) has been a thing for a while. But it turns out this uses an entirely different cosmogenic method based on atmospheric carbon (combined with Dendochronology from the tree rings). Very cool! [1]: https://en.m.wikipedia.org/wiki/Surface_exposure_dating https://en.m.wikipedia.org/wiki/Surface_exposure_dating