[Tucker39]

Or an unreliable age-testing method. If they use some crappy lash-up that inflates age in order to flack evolution and an old Earth; then it’s going to give bogus readings even if and when they’d prefer accuracy. IMHO, of course.

[ShadowAce]

Or an unreliable age-testing method.

Considering the Cosa Artifact, I'm going with this theory.

It's already been proven that determining the age of rocks is guesswork at best.