美国地理3-1-扫描版.pdfVIP

A S T O U N D I N G T R E E S | T H E D E E P E S T C A V E ? VIKINGS M A R C H 2 0 1 7 I  CO N T EN TS M A RC H 2017 VO L . 231 N O . 3 O F F I C I A L J O U R N A L O F T H E N AT I O N A L G EO G R A P H I C SO C I E T Y DEPARTMENTS FEATURES VISIONS 52 THE WISDOM OF TREES EXPLORE Every tree tells a story. Some are beyond eloquent: the apple tree that illustrated the law of gravity, the pear tree that survived 9/11, pines that can live more than 5,000 years. tools, a ship elevator, and a By Cathy Newman Photographs by Diane Cook and Len Jenshel monasteryís hidden texts STARTALK and Wayne Shorter jam with Neil deGrasse Tyson. The centuries-old Wedding named for the many nuptials that have been held under it. SPECIAL POSTER : 30 | NEW VISIONS 74 | A SEA’S FADING 86 | A FIGHT THE VIKINGS’ FAR- OF THE VIKINGS BOUNTY TO SURVIVE FLUNG REALM AND How Scandinavian farmers Politics and exploitation FEARSOME FLEET became Europeís scourge. have many enemies. By Heather Pringle By Rachael Bale By Jennifer S. Holland On the Cover A Scandinavian Photographs by Robert Clark Photographs by Photographs by and David Guttenfelder Adam Dean Stefano