Chris Marone Penn State University Latest articles by Chris Marone Mystery Behind Weak Earthquake Faults Solved By Chris Marone published 26 March 10 Earthquakes Sign up for the Live Science daily newsletter nowGet the world’s most fascinating discoveries delivered straight to your inbox.Contact me with news and offers from other Future brandsReceive email from us on behalf of our trusted partners or sponsors LATEST ARTICLES1How do archaeologists figure out the sex of a skeleton?29 surprising facts about David Attenborough on his 99th birthday3Chopped-up skulls found in Maya 'blood cave' were a ritual offering for a good harvest, archaeologists suggest4NASA just sent a giant balloon around the world in 16 days. Here's why.5Metal detectorists unearth dazzling Anglo-Saxon gold-and-garnet raven head and ring: 'It's unbelievable — I'm a bit emotional'