The cenote tunnel system is lit bright for the divers and also shows all if the formations within the cenote.
Courtesy of Roberto Chavez Arce
Take a risky dive into an underwater cave in Mexico to discover the 13,000 year-old skeleton of a prehistoric teenager. Follow forensic clues that reveal intimate details of her life and death, and how her people first ventured into North America.
NOVA: First Face of America, Wednesday at 9 p.m. on PBS 6.
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