An ancient bear skull sits on the floor of Hoyo Negro, a flooded cave on Mexico's Yucatán Peninsula.
An ancient bear skull sits on the floor of Hoyo Negro, a flooded cave on Mexico's Yucatán Peninsula.
Photograph by Paul Nicklen, Nat Geo Image Collection

Ice Age Predators Found Alongside Oldest Human in Americas

The well-preserved remains offer a glimpse into the rapidly shifting world that surrounded Naia, a girl who died around 13,000 years ago.

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