
EvolutionJuly 1, 1960
Prehistoric Man in Mammoth Cave
Some 2,000 years ago Indians went deep into the great cavern in Kentucky to mine gypsum, leaving behind them many traces of a society that was just beginning to develop agriculture

Prehistoric Man in Mammoth Cave
Some 2,000 years ago Indians went deep into the great cavern in Kentucky to mine gypsum, leaving behind them many traces of a society that was just beginning to develop agriculture

Prehistoric Man in the Grand Canyon
In an oasis at the bottom of the Canyon live the Havasupai Indians, who have now been linked to a vanished people who settled the surrounding plateau in the seventh century A.D.