Rocks Made of Plastic Found on Hawaiian BeachPlastic may be with us a lot longer than we thought. A new type of rock made from plastic, volcanic rock, sand, seashells, and corals has begun forming on the shores of Hawaii. The discovery adds to the debate about whether humanity’s heavy hand in natural processes warrants the formal declaration of a new epoch of Earth history called the Anthropocene.How Did the Moon Really Form?Sign up for our daily newsletterGet more great content like this delivered right to you!Country *AfghanistanAland IslandsAlbaniaAlgeriaAndorraAngolaAnguillaAntarcticaAntigua and BarbudaArgentinaArmeniaArubaAustraliaAustriaAzerbaijanBahamasBahrainBangladeshBarbadosBelarusBelgiumBelizeBeninBermudaBhutanBolivia, Plurinational State ofBonaire, Sint Eustatius and SabaBosnia and HerzegovinaBotswanaBouvet IslandBrazilBritish Indian Ocean TerritoryBrunei DarussalamBulgariaBurkina FasoBurundiCambodiaCameroonCanadaCape VerdeCayman IslandsCentral African RepublicChadChileChinaChristmas IslandCocos (Keeling) IslandsColombiaComorosCongoCongo, The Democratic Republic of theCook IslandsCosta RicaCote D’IvoireCroatiaCubaCuraçaoCyprusCzech RepublicDenmarkDjiboutiDominicaDominican RepublicEcuadorEgyptEl SalvadorEquatorial GuineaEritreaEstoniaEthiopiaFalkland Islands (Malvinas)Faroe IslandsFijiFinlandFranceFrench GuianaFrench PolynesiaFrench Southern TerritoriesGabonGambiaGeorgiaGermanyGhanaGibraltarGreeceGreenlandGrenadaGuadeloupeGuatemalaGuernseyGuineaGuinea-BissauGuyanaHaitiHeard Island and Mcdonald IslandsHoly See (Vatican City State)HondurasHong KongHungaryIcelandIndiaIndonesiaIran, Islamic Republic ofIraqIrelandIsle of ManIsraelItalyJamaicaJapanJerseyJordanKazakhstanKenyaKiribatiKorea, Democratic People’s Republic ofKorea, Republic ofKuwaitKyrgyzstanLao People’s Democratic RepublicLatviaLebanonLesothoLiberiaLibyan Arab JamahiriyaLiechtensteinLithuaniaLuxembourgMacaoMacedonia, The Former Yugoslav Republic ofMadagascarMalawiMalaysiaMaldivesMaliMaltaMartiniqueMauritaniaMauritiusMayotteMexicoMoldova, Republic ofMonacoMongoliaMontenegroMontserratMoroccoMozambiqueMyanmarNamibiaNauruNepalNetherlandsNew CaledoniaNew ZealandNicaraguaNigerNigeriaNiueNorfolk IslandNorwayOmanPakistanPalestinianPanamaPapua New GuineaParaguayPeruPhilippinesPitcairnPolandPortugalQatarReunionRomaniaRussian FederationRWANDASaint Barthélemy Saint Helena, Ascension and Tristan da CunhaSaint Kitts and NevisSaint LuciaSaint Martin (French part)Saint Pierre and MiquelonSaint Vincent and the GrenadinesSamoaSan MarinoSao Tome and PrincipeSaudi ArabiaSenegalSerbiaSeychellesSierra LeoneSingaporeSint Maarten (Dutch part)SlovakiaSloveniaSolomon IslandsSomaliaSouth AfricaSouth Georgia and the South Sandwich IslandsSouth SudanSpainSri LankaSudanSurinameSvalbard and Jan MayenSwazilandSwedenSwitzerlandSyrian Arab RepublicTaiwanTajikistanTanzania, United Republic ofThailandTimor-LesteTogoTokelauTongaTrinidad and TobagoTunisiaTurkeyTurkmenistanTurks and Caicos IslandsTuvaluUgandaUkraineUnited Arab EmiratesUnited KingdomUnited StatesUruguayUzbekistanVanuatuVenezuela, Bolivarian Republic ofVietnamVirgin Islands, BritishWallis and FutunaWestern SaharaYemenZambiaZimbabweI also wish to receive emails from AAAS/Science and Science advertisers, including information on products, services and special offers which may include but are not limited to news, careers information & upcoming events.Required fields are included by an asterisk(*)Scientists have long believed that our moon was formed after another planet crashed into Earth, destroying itself and shooting out debris that eventually coalesced into our lone lunar satellite. There’s one problem: Studies of the chemical composition of Earth and moon rocks don’t fit this model. Now, a new analysis of moon rocks has uncovered evidence to support the theory—and to explain the mystery of the moon’s chemical makeup.Science Moneyball: The Secret to a Successful Academic CareerFor biomedical researchers who aspire to run their own labs, the secret is to publish frequently, as first author, and in top journals. That career advice may seem obvious, but this time it’s backed up by a new analysis of data scraped from PubMed, the massive public repository of biological abstracts. See what your chances are using Science’s PI Predictor graph.A New Way to Burn CaloriesWhat if you could trick your body into thinking you were racing on a treadmill—and burning off calories—while simply walking down the street? A new study in mice explores how we can activate immune cells to make this happen—and how the process can help fight obesity and diabetes.Trees Become Refrigerators for KoalasWhen they hug acacia trees, koalas aren’t just trying to keep from falling—the trees help the marsupials cool off, researchers have discovered. The cool tree trunks stop them from overheating, suggesting that koalas need more than just eucalyptus to survive.Key Researcher Agrees to Retract Both Disputed Stem Cell PapersEarlier this year, two papers reported that simply stressing adult cells could turn them into powerful stem cells called STAP (stimulus-triggered acquisition of pluripotency) cells—and immediately drew accusations of plagiarism and image manipulation. Now, despite steadfastly defending her work, the lead author behind the papers has finally agreed to retract them both.