[Coyoteman]

I just looked and I guess they used Be-10/Be-9 dating, which doesnt make sense ince it has a shorter life than the time period used. But I am no expert in this sort of dating.

See the article I linked to in post #25.

Radiometric dating works to many multiples of the half-life. For example, radiocarbon dating works back to nine or ten half-lives. I assume it is the same for the radioisotope used here.

[aft_lizard]

I quickly misread it earlier, I thought it said it was accurate to 1.5 million years, not that its half-life was just 1.5 million. No morning coffee effect yet, soon though soon.