Seismologists have long known that the buildup of forces along fault zones cause the physical properties of rock and sediments to change deep inside the Earth, at the level where earthquakes occur.

Brad Carr, a UW associate research scientist in geology and geophysics, uses the Geoprobe instrument to sample the subsurface in the foothills of the southern Sierra Nevada in California. Carr ...

Research suggests that Paleolithic humans in the Middle East selected flint for their cutting tools based on differences in the mechanical properties of the rock. They seem to have purposefully ...