Discover 2018-07.pdf

July/August 2018 DISCOVER 3 Contents JULY/AUGUST 2018 VOL.39,NO.6KELLIE JAEGER/DISCOVERGot an itch to dive into the essentials of some newsworthy science?Weve got the scratch.In this special issue,we cover a broad range of topics that will capture your imagination.Learn about the Giza Pyramids,Clouds,Neanderthals,Personality,Pigeons,the Milky Way,the Cloud,Human Speed,Mass Extinctions,Octopuses,the Science of Music,Space Stations,Autonomous Cars,the Standard Model,Teeth and Fractals.SPECIAL FEATURESECTIONStarting on page 28.Website access code:DSD180?Enter this code at:www.DiscoverM to gain access to exclusive subscriber content.ContentsPLUSHotSummerReads P.18CrackingListeriasCode P.94HiddenSalamanderArmy P.24DiscoverSCIENCE FOR THE CURIOUSHUMAN SPEEDNEANDERTHALS CLOUDS FRACTALSSPACE STATIONSMASS EXTINCTIONSPIGEONS PERSONALITYGIZA PYRAMIDSSELF-DRIVING CARS.AND MUCH MORE!Haunting Ghost Worlds P.84 The Psychology of Politics P.17SPECIAL ISSUEP.28July/August 20184 DISCOVERMAGAZINE.COMCOLUMNS&DEPARTMENTS6 EDITORS NOTETake a Road TripThis issues special feature section is a map to Everything Worth Knowing.7 INBOXReaders comment on wearable tech and adjusting to an empty nest.20 VITAL SIGNSEye of the BeholderA childs history of bone fractures leads pediatricians to a disturbing conclusion.BY AMITHA KALAICHANDRAN24 NOTES FROM EARTHhe Salamander ArmyYoull never hear or see them,but they keep forest ecosystems strong.BY GEOFFREY GILLER90 PROGNOSISA Double WhammyChemical exposure could play a role in the development of non-alcoholic fatty liver disease.BY RACHEL CERNANSKY9 THE CRUXScientists sing the praises of an unlikely food source;learn about the connection between neurotics and Brexit;kids are having fun but also getting hurt while riding a popular two-wheeled toy;and more.CHAD LANEON THE COVERHaunting Ghost Worlds p.84The Psychology of Politics p.17Everything Worth Knowing p.28Hot Summer Reads p.18Cracking Listerias Code p.94Hidden Salamander Army p.24COVER:Bryan Christie Design94 HISTORY LESSONSCracking Listerias SecretsScientists are learning more about a hardy microbe that can live years in soil and water,survive deep freezes,and sometimes kill humans.BY CLAIRE PANOSIAN DUNAVAN98 20 THINGS YOU DIDNT KNOW ABOUT AntsSome are slaveholders,others sip blood and a few jump backward like nobodys business.BY ASHLEY BRAUN77 OUT THERE:BONUS ASTRONOMY SECTIONLearn how Chilean observatories play a five-star role in education and outreach,and take a tour of the nonexistent worlds that astronomers have thought theyve discovered over the years.Read about the hidden lives of salamanders and their critical role in natures food web on page 24.CALL CONSUMER CELLULAR AT(888)528-3882VISIT US ONLINE ATConsumerC LINESTALKUNLIMITED$45A MONTH1GBDATAUNLIMITEDTEXTINCLUDED1 LINETALKUNLIMITED$25A MONTH250MBDATAUNLIMITEDTEXT$15A MONTHINCLUDED1 LINETALK250MINUTESOUR MOST POPULAR PLANS FOR 1&2 LINES!See all of our plans at ConsumerC SWITCH BY JUNE 30TH&GET$20 FOR EVERY NEW LINE OF SERVICE!2018 Consumer Cellular,Inc.New service activation on approved credit.Cellular service is not available in all areas and is subject to system limitations.Terms and Conditions subject to change.The totals shown here are costs for monthly Consumer Cellular service only.They do not include any state or local taxes.A$20 credit will be applied for new lines activated between May 15 and June 30,2018 that remain in service at the end of the billing period.Consumer Cellular received the highest number among four non-contract value providers in the J.D.Power 2016 V2-2018 V1 U.S.Wireless Customer Care Performance Study.2018 V1 based on 4,210 total responses measuring the experiences of current wireless service customers who made a sales transaction with their current carrier within the past three months,surveyed July-December 2017.Your experiences may vary.Visit .If youre not completely satisfi ed within 30 days(data use is limited to 500MB)of activation of your service,cancel and pay nothing.AARP member benefi ts are provided by third parties,not by AARP or its ai liates.Providers pay a royalty fee to AARP for the use of its intellectual property.These fees are used for the general purposes of AARP.Some provider of ers are subject to change and may have restrictions.Please contact the provider directly for details.JUST$25RISKFREEGUARANTEE100%RANKED#1 BY J.D.POWER“Highest in Customer Service among Non-Contract Value Wireless Providers,4 Times in a Row!”100%RISK-FREE GUARANTEEIf youre not completely satisfi ed within 30 days,cancel and pay nothing.AARP MEMBER BENEFITSAARP members receive a 5%discount on service and usage every month.BRING YOUR OWN PHONEWith our free SIM card,you can even bring your own phone if youd like!LOW PRICESUnlimited talk and text is just$25/month,plus choose a data plan that fi ts your needs.VARIETY OF PHONES&DEVICESSelect any device,from fl ip phones to smartphonesincluding the latest iPhones.$SAVINGSOFMAY 15 THRUJUNE 30,20186 DISCOVERMAGAZI