New World Discovery That Changes Everything (Video)

Back in 1992 Richard Cerruti a construction-site monitor for the San Diego Natural History Museum happened to be at the right place at the right time. Cerruti had discovered the scattered remains
Of an ancient mastodon site that gradually unfolded into what would mesmerize some and infuriate others within the community of scholars studying early hominids in the New World.
Jon Bowne reports.

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