Where NASA Put a Parking Lot, Dinosaurs and Mammals Once Crossed Paths by KENNETH CHANG

By KENNETH CHANG An 8.5-foot-long slab found in Maryland preserved tracks left by prehistoric creatures. The site was almost obliterated before the rock was unearthed. Published: January 30, 2018 at 07:00PM from NYT Science http://nyti.ms/2rVW6PN