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(ISSN 1930-8116) is published seven times during the school year—September, October, November–December, January–February, March, April, May—by National Geographic Society, 1145 17th Street NW, Washington, D.C. 20036. Postmaster: Please send address changes to Attn: Young Explorer Magazine, National Geographic Society, PO Box 291875, Kettering, OH 45429. Periodical postage paid at Washington, D.C., and additional mailing offices.

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DIGITAL CREDITS | COVER: MLENNY/E+/GETTY IMAGES. TABLE OF CONTENTS: (BACKGROUND) YANN ARTHUS-BERTRAND/GETTY IMAGES PLUS; (STATUES) ANDIA/UNIVERSAL IMAGES GROUP/GETTY IMAGES; (WHALE) DESIGN PICS INC/ALAMY STOCK PHOTO; (BIRD) © TUI DE ROY/MINDEN PICTURES. STONE GIANTS: (ROW OF STATUES) JON ARNOLD IMAGES LTD/ALAMY STOCK PHOTO; (STATUE ARTWORK) NGS STAFF; (STATUE WITH RED HAT) MARCO RAMERINI/ALAMY STOCK PHOTO; (FOUR STATUES) ANDIA/UNIVERSAL IMAGES GROUP/GETTY IMAGES; (BOTH MAPS) MAPPING SPECIALISTS, LTD; (STONE ART) D1SK/SHUTTERSTOCK. WHALE FOOD: (WHALE VIDEO) UNDERWATERCAM.TV/SHUTTERSTOCK; (SINGLE KRILL) AUSCAPE/UNIVERSAL IMAGE GROUP/GETTY IMAGES PLUS; (KRILL SWARM PHOTO) © RICHARD HERRMANN/MINDEN PICTURES; (KRILL VIDEO) NATURE FOOTAGE; (WHALE BREACHING) DESIGN PICS INC/ALAMY STOCK PHOTO; (WHALE FEEDING ARTWORK) CLAUS LUNAU/SCIENCE SOURCE. THE BEST BEAK: (BACKGROUND) BILL GOZANSKY/ALAMY STOCK PHOTO; (PAD) 89STUDIO/SHUTTERSTOCK; (DARWIN) BILHA GOLAN/SHUTTERSTOCK; (PEN) SCISE10/SHUTTERSTOCK; (SANTIAGO ISLAND) JESSE KRAFT/ALAMY STOCK PHOTO; (BIRD ILLUSTRATIONS) STEVE MCCRACKEN; (GREEN WARBLER FINCH) © ALAN GREENSMITH / ARDEA.COM/AGE FOTOSTOCK; (GROUND FINCH) © TUI DE ROY/MINDEN PICTURES; (CACTUS FINCH) KUMAR SRISKANDAN/ALAMY STOCK PHOTO; (WOOD BACKGROUND) GRAPGRAPHIC49/SHUTTERSTOCK; (BIRD ILLUSTRATIONS) STEVE MCCRACKEN. WORDS TO EXPLORE: (KRILL) © NORBERT WU/MINDEN PICTURES; (BIRD) PETE OXFORD/MINDEN PICTURES; (STATUE) RAPHAEL KOERICH/500PX PRIME/GETTY IMAGES; (ISLAND) HEMIS/ALAMY STOCK IMAGES. THE END: GABOR KOVACS PHOTOGRAPHY/SHUTTERSOCK.