Ah, science.

Right here in Central Oregon they have found evidence of the earliest humans on this continent; 14,300 years ago.

How do they know this?

From 'coprolites.' Which are....how to say this, coprolites are....well, fossilized....crap, shit, doo doo.

Not only that, but....dog crap. Yes, sometime 14,300 years ago a human got eaten by a dog who then crapped in a cave and the fossilized remains were dug up by scientists.

I know how it feels.

Of course, with current dog doo doo laws, scientists 14,300 years from now will have no evidence of our existence.