ScienceShot: Ancient Martian Flood

first_imgPlanetary geologists have long sought to explain regions on Mars where broad areas are littered with shattered, tilted, kilometers-thick chunks of rock. In many cases, these so-called chaotic terrains also seem to be sources of fantastic floods (such as the Aram Chaos crater, upper left; relative elevations range from red [high] to low [blue]). Previously, some teams have proposed that these floods resulted when immense subterranean reservoirs of ice were suddenly melted by the rise of molten material from deep within the Red Planet, and others have suggested that the water was carried from distant regions via aquifers and then somehow abruptly released. A fresh hypothesis suggests that the chaotic terrain in and around Aram Chaos resulted when a buried ice lake trapped in the ancient impact crater suddenly collapsed. In this scenario, the 4.2-kilometer-deep crater started collecting water soon after it formed about 3.5 billion years ago. Then, after the 1.5-km-or-so-deep lake froze, windblown sediments began to accumulate upon its surface. Once that material reached a thickness of 2 kilometers, it blocked the transfer of heat from Mars’s interior, allowing it to melt a large fraction of the buried lake’s ice. Eventually, sometime about 2.5 billion years ago, the weight of the sediments caused the lake’s icy ceiling to collapse, sending immense amounts of water to the surface, the researchers propose online this month in Icarus. Then, that water broke through the crater rim (artist’s concept, lower right), possibly through a weak spot previously eroded by ground water seeping through the rocks at high pressure. Over the course of 30 days or so, possibly less, about 93,000 cubic kilometers of water—almost 80% of the volume of all free-flowing fresh water on Earth today—carved the 15-km-wide, 2.5-km-deep Aram Valley.See more ScienceShots.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(*)last_img read more

Porn Site Offers Elon Musk NonSex Role

first_img Elon Musk’s Cheeky ‘Nuke Mars!’ Post Is Taking Over TwitterTesla EV Catches Fire After Colliding With Tow Truck in Moscow Let us know what you like about Geek by taking our survey. Elon Musk has been invited to make his pornography debut (as far as we know), in exchange for cash and cannabis.Marijuana-infused adult entertainment site XBlaze reportedly offered Musk a “non-sex” role in a smut film, according to British tabloid The Sun.Musk made headlines recently for smoking a joint during a live podcast recording with comedian Joe Rogan.Between doing a Neil deGrasse Tyson impression and quizzing the Tesla and SpaceX chief on the future of automobiles, Rogan handed the entrepreneur a blunt filled with tobacco and marijuana.“I mean, it’s legal, right?” Musk asks before inspecting the object, taking a drag, and passing it along to the next person.Yes, it’s legal in California, where the podcast was recorded. But Musk’s single hit is the controversy heard round the nation.Following the live broadcast, Tesla shares fell more than 6 percent, and the company’s accounting lead resigned after a month on the job.The incident could also have serious implications for SpaceX, which holds Air Force contracts and has access to classified information about government satellites. As others have pointed out, Musk likely has security clearance—a privilege that prohibits the use of cannabis.The U.S. Air Force is not, contrary to some reports, currently investigating Musk. But that doesn’t mean he’s off the hook just yet.Instead of pot-shaming the businessman, though, XBlaze CEO Jeff Dillon praised him for being “a fearless man with an adventurous spirit.”One that Dillon hopes will score his website a special cameo.Elon Musk “almost never” smokes pot—unless he’s on a live podcast recording (via Joe Rogan Experience/YouTube)“I believe that we could make an incredible film together that combines your endless energy, exploratory nature and can-do attitude,” he wrote in a letter to Musk, dated Sept. 7. “Having weed and porn stars on the set would be a plus, too!”Maybe for Dillon. But ask Musk admitted to Rogan, he’s “not a regular smoker.” In fact, he “almost never” partakes in the drug.“I know a lot of people like weed. And that’s fine,” Musk said. “But I don’t find that it’s very good for productivity. Not for me.”No worries: Dillon still wants to pay the impresario in cold, hard cash—$150,000 of it. (As well as “a lifetime of indelible memories from your day with us during the shoot.”)There is no word on whether Musk plans to take him up on the offer.Elon Musk is no stranger to headlines: Since launching an IRL flamethrower, he’s come under scrutiny for calling nanotechnology “BS” and delivering a useless minisub to the children stuck in a cave in Thailand. Read more about his escapades here.center_img Stay on targetlast_img read more