James, carbon dating is only reliable for 50,000 years back.
We'd have to use something special on Jon. Volcanic ash or index fossils.
Jon, do you remember any herbivorous pig-like, semi-aquatic animals wandering around when you were little? Did they have tusks and beaks like a turtle? If so, that's Lystrosaurus, and I'd like know how you survived the Permian Extinction.