C8T1P1-a-chronicle-of-timekeeping
摘要:AChronicleofTimekeepingOurconceptionoftimedependsonthewaywemeasureitA.Accordingtoarchaeologicalevidence,atleast5,000yearsago,andlongbeforetheadventoftheRomanEmpire,theBabyloniansbegantomeasuretime,introducingcalendarstoco-ordinatecommunalactivities,toplantheshipmentofgoodsand,inparticular,toregulateplantingandharvesting.Theybasedtheircalendarsonthreenaturalcycles:thesolarday,markedbythesuccessiveperiodsoflightanddarknessastheearthrotatesonitsaxis;thelunarmonth,followingthephasesofthemoonasitorbitstheearth;andthesolaryear,definedbythechangingseasonsthataccompanyourplanet'srevolutionaroundthesun.B.Beforetheinventionofartificiallight,themoonhadgreatersocialimpact.And,forthoselivingn
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