(PhysOrg.com) -- Eryka Thorley had already excavated ancient fire hearths and stone flakes, but a severe thunderstorm on the final day of field work added a new dimension to the archaeology dig in southeast Montana.
(PhysOrg.com) -- Eryka Thorley had already excavated ancient fire hearths and stone flakes, but a severe thunderstorm on the final day of field work added a new dimension to the archaeology dig in southeast Montana.