The fact that 13,000 years is not so long that the connections between ancient and modern people have been severed.

The fact that the people who come after a burial, eventually, may include the actual descendants of the person buried.

The fact that human continuity — across millennia, across ecological transformations, across the rise and fall of cultures and technologies and languages — is real, and that the child in the Montana sandstone is evidence of it.

The burial was found.

The child was identified.

The genome was sequenced.