 He's got a couple books out there. Would this one be the Deep History in the Ages of Man? There you go. How about that? That's the one. That's the one. Yeah. My first go-round, too. East of the Rockies. Joe's with us. Long Island, New York. Joseph. Hey, Mark. Two quick questions and a brief comment on Mars. The first question is, you were talking about the shifting land mass over half a billion years, but