I 



FEATURES 



COVER STORY 



34 ORIGINS OF FLORAL DIVERSITY 



A quarter-million flowering plants attest 

 to a highly flexible developmental recipe. 

 AMY LITT 



48 GOOD FENCES, 

 GOOD NEIGHBORS? 



Can Botswana simply cordon off the conflicts 

 dividing ecotourism, cattle farming, 

 and the interests of conservation? 



GRACIELA FLORES 



42 THIS OLD HOUSE 



At Qatalhoytik, a Neolithic site 

 in Turkey, families packed their houses 

 close together and traipsed over roofs 

 to climb into their rooms from above. 



IAN HODDER 



ON THE COVER: 



Jean-Bernard Carillet, 

 Frangipani flower 



