Small, Violent Faults Possibly Led to Grand Canyon’s Missing Rocks

<p>New research has pinpointed small, violent faults caused by the breakup of an ancient supercontinent as the potential cause of a major loss in the rock record of the Grand Canyon, known as the Great Unconformity. Plus, using sky mapping tools to find earthly tombs and a review of Andy Weir’s “Project Hail Mary.”</p>