The 13,900-Year-Old Mastodon Rib Found With A Bone Point Still Inside — And The CT Scan That Put Hunters Before Clovis
The broken tip survived because it got stuck.
Because it struck bone rather than soft tissue.
Because the bone that absorbed it was part of a skeleton that was preserved by an ancient wetland environment.
Because that environment was eventually drained and a backhoe cut through it in 1977.
Because Carl Gustafson was there to recognize what the exposed bones represented.
Because the rib was carefully excavated and preserved.
Because AMS radiocarbon dating was developed and applied.