By Jessica Yadegaran
From The Mercury News
DESCHUTES NATIONAL FOREST, Calif.—We are in one of the darkest, quietest places on earth: an ancient subterranean cave in Central Oregon’s volcanic, sage-covered high desert. At this moment, 30 feet underground and about 3,000 feet deep, our naturalist guide has instructed us to turn off our headlamps and remain silent for one minute.
