简介:<正>1.Inspiteofthetitle,thisarticlewillreallybeonhownottogrowold,which,atmytimeoflife,isamuchmoreimportantsubject.Myfirstadvicewouldbetochooseyourancestorscarefully.Althoughbothmyparentsdiedyoung,Ihavedonewellinthisrespectasregardsmyotherancestors.Mymaternalgrandfather,itistrue,wascutoffintheflowerofhisyouthattheageofsixty-seven,
简介:Foryears,astronomersstruggledtocalculatetheageoftheuniverse.Estimatesrangedfrom10to20billionyearsold,afrustratinglylargespread.ButthatwasbeforethelaunchoftheHubbleSpaceTelescope,namedaftertheastronomerwhosediscovery70yearsagobeganthequesttolearntheuniverse'sage.
简介:Amotherandheryoungsongotintoabusinasmallcityandsatdown.Thebusconductorcametothemfortheirmoney.Themothersaid,'IwantonetickettoLondon,'andgaveherashilling(先令,英国货币单位,1先令等于12便士)..Theconductorlookedatthesmallboyforafewsecondsandthensaidtohim,'Howoldareyou,youngman?