"The bone fragments, some from a mastodon’s stout thigh, were scarred with marks and notches that are hallmarks of a violent blow on fresh bone. Old bone, the s

"The bone fragments, some from a mastodon’s stout thigh, were scarred with marks and notches that are hallmarks of a violent blow on fresh bone. Old bone, the scientists say, shows different fracture patterns." [1] https://www.usatoday.com/story/news/nation/2017/04/26/humans-americas-discovery-mastodon-bones/100924148/ https://www.usatoday.com/story/news/nation/2017/04/26/humans...