Contents 



Vol. 103, No. 4, April 1994 



The Marvelous Mammalian Parade 



40 A Pocketful of Fossils byMkhaeU. Novacek 



44 World Furry-weight Champions by Michael Archer 



48 Mammals Eggstraordinaire fey Mfc/iae/ Archer 



50 Suooessful in Spite of Themselves by s. David Webb 



52 The Great American Interchange 



56 Early Relatives of Flopsy Mopsy and Cottontail 



by Malcolm C. McKenna 



59 The Devil's Corkscrew by Lany d. Martin 



61 D\s]ari\lUun6er by Bryn J. Mader 



63 The Heyday of Horses by Bruce J. MacFadden 



66 Why Antlers Branched Out by Valerius Geist 



70 Green in Tooth and Claw by Margery C. Coombs 



72 West Indian Tuskers by Daryi Domning 



lA Key to the Carnivores by Richard h. Tedfard 



78 The Sobertooth's Repeat Performances by Christine Janis 



84 Tough Times in the Tor Pits byBlalre Van Valkenburgh 



86 The Whales of Tethys by PhiUp d. Gingerich 



90 Caught in Time by Richard H. Tedford 



Departments 



Cover: a pair o/Smilodon, saber- 

 toothed cats, yawn and stretch on 

 a wann rock. Painting b\ Marianne 

 Collins; © 1993 by W. W. Noiton 

 and Company. Stories on pages 

 74. 78. and 84. 



4 This View OF Life 



by Stephen Jay Gould 

 Dousing Diminutive Dennis 's 

 Debate 



14 Science Lite 



by Roger L Welsch 

 Socket to Me 



20 This Land 



by Robert H. Mohlenbrock 

 Shingleton Bog. Michigan 



92 At THE American Museum 

 OF Natural History 



96 Celestial Events 



by Gail S. Cleere 

 Moonstruck 



100 The Natural Moment 

 Photographs by Esther Beaton 

 Bumper to Bumper 



102 Authors 



