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DIGITAL CREDITS | COVER: RICHARD PACKWOOD/OXFORD SCIENTIFIC/GETTY IMAGES. TOC: (BACKGROUND) HOLLY PATTERSON/EYEEM/GETTY IMAGES; (CACTUS) FRANK STAUB/PHOTODISC/GETTY IMAGES; (PUFFIN VIDEO) MANTAPHTO/CREATAS VIDEO/GETTY IMAGES; (DOLPHIN) PACIFIC PRESS/ALAMY STOCK PHOTO. PUFFIN PARENTS: (PUFFIN WITH NESTING MATERIALS) WILDLIFE GMBH/ALAMY STOCK PHOTO; (NEST WITH EGG) MIKE JONES/CORBIS DOCUMENTARY/GETTY IMAGES; (ADULT & CHICK) FLPA/ALAMY STOCK PHOTO; (PUFFIN WITH FISH) © ROB REIJEN/NIS/MINDNE PICTURES; (PUFFINS FLYING PHOTO) WERNER BOLLMANN/AGE FOTOSTOCK; (PUFFINS FLYING VIDEO) BBC NATURAL HISTORY/BBC CREATIVE/GETTY IMAGES; (PUFFIN LANDING) © DANNY GREEN/NATUREPL.COM; (PUFFIN IN NEST) ANNE GILBERT/ALAMY STOCK PHOTO; (PUFFIN SITTING) © DANNY GREEN/NPL/MINDEN PICTURES; (PUFFIN SWIMMING) © ALEX MUSTARD/2020VISION/NATUREPL.COM; (PUFFIN FLYING) ROBBIE GEORGE/NATIONAL GEOGRAPHIC IMAGE COLLECTION; (PUFFIN SITTING WITH FISH) IMAGES FROM BARBANNA/MOMENT OPEN/GETTY IMAGES. A GIANT CACTUS: (CACTUS WITH MOUNTAINS IN BACKGROUND) FRANK STAUB/PHOTODISC/GETTY IMAGES; (WOODPECKERS) GASTON PICCINETTI/AGE FOTOSTOCK; (OWL) K LORENZ CRAIG/SCIENCE SOURCE/GETTY IMAGES; (BEES) DGHAYES/ISTOCK/GETTY IMAGES; (BAT) MERLIN D. TUTTLE/SCIENCE SOURCE; (DOVE VIDEO) ANDRE BAGET/SHUTTERSTOCK; (BAT EATING) MERLIN D. TUTTLE/SCIENCE SOURCE; (DESERT) LUCKY-PHOTOGRAPHER/ISTOCK/GETTY IMAGES PLUS. CACTUS LOOK-ALIKES: (PIN CUSHION CACTUS) ELENAKIREY/ISTOCK/GETTY IMAGES PLUS; (OCTOPUS CACTUS) STUDIO-DATSUZOKU/ISTOCK/GETTY IMAGES PLUS; (BARREL CACTUS) GERALD C. KELLEY/SCIENCE SOURCE; (BUNNY EAR CACTUS) GILLES LE SCANFF & JOELLE-CAROLINE MAYER/BIOSPHOTO/GETTY IMAGES; (BARREL) NIKREATES/ALAMY STOCK PHOTO; (BUNNY) EFFECTIVE STOCK PHOTOS/SHUTTERSTOCK; (OCTOPUS) WATERFRAME/ALAMY STOCK PHOTO; (PIN CUSHION) JUDITH COLLINS/ALAMY STOCK PHOTO. HOW MIRRORS WORK: (DOLPHIN) PACIFIC PRESS/ALAMY STOCK PHOTO; (ORANGUTANS) © MASAHIRO LIJIMA/ARDEA.COM; (MIRROR VIDEO) ANURUG/CREATAS VIDEO/GETTY IMAGES; (ELEPHANT) JOHN WARBURTON-LEE PHOTOGRAPHY/ALAMY STOCK PHOTO. EXPLORER MAPS LOGO: STEVE MCCRACKEN. ENDING PUFFIN PHOTO: JAMES WARWICK/OXFORD SCIENTIFIC/GETTY IMAGES.