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

Traverse 330 steps on the way to such distinctive chambers as the “Devil’s Kitchen” and the “Crystal Vault.” Wild caving ...

Fluorescent cave minerals are helping scientists explore how life could survive in harsh places like Europa. Far beneath ...

Arguments still rage about how the pyramids were built, but a new discovery has taken giant steps toward the incredible truth ...

Most people think of visiting big cities, national parks, and beaches when they plan a U.S. trip. There’s hardly anyone who’s ...

Siffre’s story started in 1939, in Nice, on the Mediterranean coast of France – but it wasn’t until 1962 that the events that ...