The teeth are the record of it.

And the record is now written into the scientific literature, where it will remain — challengeable, testable, open to revision by future evidence, but real — for as long as science records what we know about who we are and where we came from.

Three teeth.

Twenty-five thousand years.

The oldest known chapter in the story of the human relationship with psychoactive plants.

It ends here.

Or rather: it begins here.

Because the question of what came before — what the full depth of this relationship is, how far back it goes, what it meant to the people who lived it — is still open.

The teeth have told us what they know.

The rest is waiting to be found.