Popular Science

CARVING STONE

-

The Gouffre Berger system in France descends to a nadir that sits 3,500 feet below sea level, about the height of three and a half Eiffel Towers. To get there, cavers spend at least 15 minutes paddling through a freezing, 10-foot-deep river. As Shone’s fellow explorer illustrate­s here, a waterproof camera bag can serve as a flotation device. In heavier rains, the porous limestone in the well-documented system allows the eroding water to surge to the roof, continuing to slowly carve the rock in the process.

 ??  ??
 ??  ??

Newspapers in English

Newspapers from United States