National Geographic 2019年第03期.pdf

“Something great is around those stars.”SARA SEAGER,ASTROPHYSICISTWE ARE NOT ALONEScientists say there must be other life in the universe.Heres how theyre searching for it.03.2019oE?&?d?HEALTHY HAIR by HERBAL ESSENCESN AT I O N A L G E O G R A P H I CP R O O FE M B A R KE X P L O R EC O N T E N T SDECODEREvolved to CrackScientists are learning more about how ele-phants get the creases in their skin and why those crevices are so important to them.BY MONICA SERRANOTHROUGH THE LENSStrange ReflectionsDuring the annual flood season in Venice,build-ings appear as distorted images on the water.Within those reflections,a photographer finds bizarre creaturesand also solace.BY JODI COBBALSOTransparent ButterfliesA Mighty New Dinosaur178On the CoverThe Milky Way glows above one of the 64 antennas of MeerKAT,a supersensitive telescope that scans the sky for radio signals.Its located in South Africas Northern Cape Province.SAREL VAN STADEN AND MARYNA COTTON;PANORAMA COMPOSED OF THREE IMAGES M A RC H 2 0 1 9Conjuring CloudsWith water vapor,smoke,lights,and imagination,a Dutch artist makes clouds in unexpected placesand coaxes them to pose for the camera.PHOTO PROJECT BY BERNDNAUT SMILDE34THE BIG IDEAA Wake-Up Call on Water QualityOne-quarter of Amer-icans drink water from systems that arent safe.BY RHEA SUHGENIUSSafer.Cheaper.Greener.Engineer Leslie Dewan wants to reinvent nuclear energy.BY RACHEL HARTIGAN SHEAF E A T U R E SNo Way OutCriminal gangs have fractured El Salvador.BY JASON MOTLAGHPHOTOGRAPHS BY MOISES SAMAN AND ADAM FERGUSON.P.76Borneos Vast UnderworldMalaysias Mulu caves boast chambers that are millions of years old.BY NEIL SHEAPHOTOGRAPHS BY CARSTEN PETER.P.100TreehoppersThese mini-monsters are masters of disguise.BY DOUGLAS MAINPHOTOGRAPHS BY JAVIER AZNAR GONZLEZ DE RUEDA.P.120Rituals of RebellionThe Americas carnivals honor revelers roots.BY JACQUELINE CHARLESPHOTOGRAPHS BY CHARLES FRGER.P.132Whos Out There?The big existential question is no longer,Is there life beyond Earth?Its a pretty sure bet there is.The question now is,How do we find whoor whatis alive out there?And we are getting really close to answering it.BY JAMIE SHREEVEPHOTOGRAPHS BY SPENCER LOWELLART BY DANA BERRY.P.42M A R C H|C O N T E N T SInspired by your creativity,the Nikon Z 6 is a versatile,compact full-frame camera that brings legendary Nikon optical excellence to both photography and videography.The revolutionary Z mount unlocks the potential of NIKKOR Z lenses,while an innovative adapter allows you to shoot with approximately 360 F-Mount NIKKOR lenses.*All of which lets you capture spectacular photos and full-frame 4K UHD video with full pixel readout.Mirrorless,reinvented by Nikon,means a future full of creative possibility.24.5 MP|UP TO 12 FPS|4K UHD(FULL-FRAME+FULL PIXEL READOUT)|IN-CAMERA 5-AXIS VR|10-BIT OUTPUT+N-LOGLEARN MORE AT NIKONUSA.COM/MIRRORLESS MIRRORLESSREINVENTED*For compatibility with the optional Mount Adapter FTZ,please visit is a registered trademark of Nikon Corporation.2019 Nikon Inc.N E V E R M I S S A MOM E N TO F A N I N C R E D I B L E STO RYInspired by your creativity,the Nikon Z 6 is a versatile,compact full-frame camera that brings legendary Nikon optical excellence to both photography and videography.The revolutionary Z mount unlocks the potential of NIKKOR Z lenses,while an innovative adapter allows you to shoot with approximately 360 F-Mount NIKKOR lenses.*All of which lets you capture spectacular photos and full-frame 4K UHD video with full pixel readout.Mirrorless,reinvented by Nikon,means a future full of creative possibility.24.5 MP|UP TO 12 FPS|4K UHD(FULL-FRAME+FULL PIXEL READOUT)|IN-CAMERA 5-AXIS VR|10-BIT OUTPUT+N-LOGLEARN MORE AT NIKONUSA.COM/MIRRORLESS MIRRORLESSREINVENTEDM A R C H|W H A T S C O M I N GNATIONAL GEOGRAPHIC(ISSN 0027-9358)PUBLISHED MONTHLY BY NATIONAL GEOGRAPHIC PARTNERS,LLC,1145 17TH ST.NW,WASHINGTON,DC 20036.$39 PER YEAR FOR U.S.DELIVERY,$44.00 TO CANADA,$51.00 TO INTERNATIONAL ADDRESSES.SINGLE ISSUE:$7.00 U.S.DELIVERY,$10.00 CANADA,$15.00 INTERNATIONAL.(ALL PRICES IN U.S.FUNDS;INCLUDES SHIPPING AND HANDLING.)PE-RIODICALS POSTAGE PAID AT WASHINGTON,DC,AND ADDITIONAL MAILING OFFICES.POSTMASTER:SEND ADDRESS CHANGES TO NATIONAL GEOGRAPHIC,PO BOX 37545,BOONE,IA 50037.IN CANADA,AGREEMENT NUMBER 1000010298,RETURN UNDELIVERABLE ADDRESSES TO NATIONAL GEOGRAPHIC,PO BOX 819 STN MAIN,MARKHAM,ONTARIO L3P 9Z9.UNITED KINGDOM NEWSSTAND PRICE 5.99.REPR.EN FRANCE:EMD FRANCE SA,BP 1029,59011 LILLE CEDEX;TEL.320.300.302;CPPAP 0720U89037;DIRECTEUR PUBLICATION:D.TASSINARI.DIR.RESP.ITALY:RAPP IMD SRL,VIA G.DA VE-LATE 11,20162 MILANO;AUT.TRIB.MI 258 26/5/84 POSTE ITALIANE SPA;SPED.ABB.POST.DL 353/2003(CONV L.27/02/2004 N.46)ART 1 C.1 DCB MILANO STAMPA.QUAD/GRAPHICS,MARTINSBURG,WV 25401.SUBSCRIBERS:IF THE POSTAL SERVICE ALERTS US THAT YOUR MAGAZINE IS UNDELIVERABLE,WE HAVE NO FURTHER OBLIGATION UNLESS WE RECEIVE A CORRECTED ADDRESS WITHIN TWO YEARS.Subscriptions For subscriptions or changes of add