Rocks found near the mastodon bones have been proposed to have functioned as hammers and anvils.
Sources
- Have Humans Been in the Americas Longer Than We Thought? (daily.jstor.org)
- https://www.nature.com/articles/nature22065 (nature.com)
- https://www.sdnhm.org/science/consulting-services/paleo-services/projects/cerutti-mastodon/ (sdnhm.org)
- https://www.usgs.gov/publications/a-130000-year-old-archaeological-site-southern-california-usa (usgs.gov)
- https://www.smithsonianmag.com/science-nature/new-evidence-human-activity-north-america-130000-years-ago-180963046/ (smithsonianmag.com)
- https://amp.cbc.ca/news/science/humans-north-america-130000-1.4086109 (amp.cbc.ca)
- https://news.unl.edu/article/husker-grads-findings-may-reshape-human-history (news.unl.edu)
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