资源描述：
《Too damned quite》由会员上传分享，免费在线阅读，更多相关内容在行业资料-天天文库。
1、TooDamnedQuiet?AdrianKentPerimeterInstitute,31CarolineStreetN,Waterloo,Ontario,N2L2Y5,Canada.∗(Dated:February2005;minorrevisionApril2005)AbstractItisoftensuggestedthatextraterrestiallifesufficientlyadvancedtobecapableofinterstellartravelorcommunicationmustberare,sinceotherwisewewouldhaveseenevid
2、enceofitbynow.Thisinturnissometimestakenasindirectevidencefortheimprobabilityoflifeevolvingatallinouruniverse.Acoupleofotherpossibilitiesseemworthconsidering.Oneisthatlifecapableofevidencingitselfoninterstellarscaleshasevolvedinmanyplacesbutthatevolutionaryselection,actingonacosmicscale,tendst
3、oextinguishspecieswhichconspicuouslyadvertisethemselvesandtheirhabitats.Theotheristhat–whateverthetruesituation–intelligentspeciesmightreasonablyworryaboutthepossibledangersofself-advertisementandhenceinclinetowardsdiscretion.Thesepossibilitiesarediscussedhere,andsomecounter-argumentsandcompli
4、catingfactorsarealsoconsidered.arXiv:1104.0624v1[physics.pop-ph]4Apr2011∗Permanentaddress:DepartmentofAppliedMathematicsandTheoreticalPhysics,UniversityofCam-bridge,WilberforceRoad,CambridgeCB30WA,UnitedKingdom.1I.COMMENTS:APRIL2011Thisarticlewaswritteninearly2005,andsubmittedthentoScience.Per
5、hapspredictablyenough,itwasrejected.Sincethenithaslanguishedinmyfilespace,whileIoccasionallywonderedwhethertotrytomakeitmorepublishableinapeer-reviewedsciencejournal(andindeedwhetherthatwaspossible).Havingrecentlynoticed2003and2005arxivpapersbyBeatrizGato-Riveraexpressingsomeverysimilarideas[1,
6、2],Idecidednowtobitethebulletanddistributeitasis.Sometimes,oneshouldhavethecouragetocommunicatehypothesesevenwhentheyaredifficultorimpossibletotestanytimesoonorarguerigorouslyfor.(AsProfGato-Riveradid:credittoher.)Gato-Riverafocussesonthepossibilitythatalladvancedcivilisationswoulddeliberatelyan
7、dconsciouslychoosetoremaininconspicuous,whichshecallstheUndetectabilityConjecture.Whiletheideasinthispaperobviouslycanfitwiththispremise,itseemstomethatthecaseforundetectability(suchasitis)ismadealittlestrongerbyconsideringtheevolutionar
