Clottes led research on Chauvet Cave that helped to fuel the idea of a European “human revolution.” “Why shouldn’t they make hand stencils if they wanted to?” he asks, when I reach him ...

In the early 1900s, German engineer Gustav Shulz devised the idea to turn the sea cave into a money-making tourist attraction ...

French explorer Michel Siffre spent more than 60 days underground in July 1962 to discover how the human body would be ...