The ancient people who attacked the mastodon did not intend to leave an archaeological record.

They were hunting, not archiving.

The fact that they did leave a record — one of the most precise and direct records of ancient human hunting behavior in North America — is an accident of physics and geology and fourteen millennia of fortuitous preservation.

This accident is worth keeping in mind as a reminder of the extraordinary contingency that underlies all archaeological evidence.

Every ancient object that survives to be discovered and studied survived by accident — the accident of being preserved when everything around it was destroyed.