... UNDER A GREEN SKY GLOBAL WARMING, THE MASS EXTINCTIONS OF THE PAST, AND WHAT THEY CAN TELL US ABOUT OUR FUTURE Peter D Ward The climate is like a wild beast, and we’re poking ... around us that are making the long trek to Vegas across the Nevada no-man’s-land and shoot onto the wide, pale playa, an old lake bed of Ice Age antiquity that stands between us and the hills ahead, ... followed a path through sand dunes down toward the sunny, surf-swept strand The Cretaceous and Tertiary strata turned out to be at the back of a wide, sandy beach, the kind of sand that demands bare...