Seismologists studying earthquake patterns in California have uncovered extraordinary evidence of a rare geological process ...

But none were quite as formidable as the snowy granite mountain range rising east of Sacramento. Getting through the Sierra Nevada would require fortitude, technology -- and the sacrifice of many ...

The mountain yellow-legged frog was once the most abundant amphibian in Southern California's Sierra Nevada and Transverse Ranges. Just decades ago, it was hard to walk around many of California's ...