fossils on which he based his descriptive 

 research and his paleontological conclu- 

 sions. Afterward, he spent untold hours in 

 the laboratory, carefully smdying the fos- 

 sils that he and other paleontologists had 

 collected. 



Like Osbom and Matthew, Simpson 

 wrote about the evolution of horses. But in 

 contrast to Osbom's sweeping and rela- 

 tively simple (unilineal) view of equid 

 evolution, he dehneated a complex history 

 that involved several evolutionary Unes, 

 progressing from woodland browsers to 

 high-plains grazers. As Simpson put it, 

 'TEvolution doesn't move in straight lines, 

 but the minds of some scientists do." In 

 developing these studies, he was in many 

 respects following the path that Matthew 

 had taken some decades earUer. 



Two lines of research by Sunpson de- 

 serve particular mention. One was exem- 

 plified in his two thorough monographs 

 about all the Mesozoic mammals known 

 at the time he was entering upon his re- 

 markable paleontological career. His other 

 research was his detailed study of the clas- 

 sification of all mammals — both living 

 and extinct — a long-term project that es- 

 tabhshed him as an authority on the rather 

 legahstic subject of animal taxonomy. 



Most of his scientific career was spent at 

 the American Museum, but in 1959 he 

 moved to Harvard. His final years were 

 spent in Tucson, Arizona, where he was 

 associated with the University of Arizona. 



Today the study of organic evolution at 

 the American Museum of Natural History 

 is in its second century of research and the 

 four men are now historical figures. The 

 contemporary effort, involving modem, 

 expanded techniques at paleontological 

 sites around the world and modem sophis- 

 ticated studies in the laboratory, is a pro- 

 jection of the seminal research by Osbom, 

 Matthew, Gregory, and Simpson, who 

 through three-quarters of a century estab- 

 lished the Museum as a world center for 

 evolutionary fact and theory. Theirs were 

 lasting contributions to our knowledge of 

 the history of life. 



Edwin H. Colbert, for many years chair- 

 man of the American Museum's Depart- 

 ment of Vertebrate Paleontology, knew 

 and worked with the great paleontologists 

 he writes about. (He began his career in 

 J 930 as an assistant to Henry Fairfield 

 Osbom.) Now curator of vertebrate pale- 

 ontology at the Museum of Northern Ari- 

 zona, he lives in Flagstaff with his wife, 

 Margaret — the daughter of paleontologist 

 William Diller Matthew. 



MOROCCO 



The Road of the 

 Thousand Kasbahs 



September 24 - 

 October 8, 1994 



Few places evoke images of such exotic splendor as the North African coun- 

 try of Morocco. With opulent cities replete with minarets, mosques, palaces 

 and souks, ancient kasbahs filled with colorfully robed Berbers and starkly 

 beautiful landscapes, Morocco is a feast for the senses. 



This September, an American Museum guest specialist in Islamic studies will 

 lead an exciting trip to the exotic cities, towns and desert villages of Morocco. 

 We will visit such fabled and exotic cities as Marrakesh, Fes and Meknes, 

 while also seeing a very different Morocco as we explore the Sahara Desert, 

 the Atlas Mountains and the walled adobe villages of the renowned Road of 

 the Thousand Kasbahs. 



American 

 Museum of 

 Natural 

 History 



Discovery Tours 



Central Park West at 79th St. 



New York, NY 10024-5192 



Toll-free (800) 462-8687 or 



(212) 769-5700 in NYS 



.™,SL,.s5 « AJ-SAs'*^.****-!. 



Get The Best Night's Sleep Ever 



• Select Comfort's Air Cushion 

 Design Conforms Perfectly to 

 Your Body's Contours 



• Cradles You in Total Comfort 



• Recommended for Back Pain 



• You Adjust the Firmness to 

 Meet Your Specific Needs 



• 20 Year Limited Warranty 



• Adjust Your Side Separately 



• Try Risk-Free for 90 Nights 



Call Now For Your 



Select Comfort provides proper back support and | i3 JlaB l2^cl 1 ^r I I 



contours to your body, distriouting weight evenly. A"^5vr Vr"^5^#i" X^^XX 



SELECT COMFORI" 



Innerspring mattresses create pressure points 

 and uneven support. 



CORPORATION 



9301 75th Ave. N. 

 Minneapolis, MN 55428-1003 



©Select Comlorl Corp. 1994 Dept 2710 



67 



