Last Laugh Layers Here the ancient seas are dry. Here the gravesites all pile high. Here Jurassic, Cenozoic; all dead fossils, some heroic. Some in pieces, tooth and nail, lie buried in the local shale.   The dino wake starts. Goodness gracious, time to party through Cretaceous. Here's a glass, so meteoric, raised to toast the prehistoric. Do we miss them? Now and then. But we survivors say, "Amen." Excerpted from Last Laughs: Prehistoric Epitaphs by Jane Yolen, J. Patrick Lewis All rights reserved by the original copyright owners. Excerpts are provided for display purposes only and may not be reproduced, reprinted or distributed without the written permission of the publisher.