科学万年前猛犸象的DNA揭示了

WhenLoveDalénfirstbeganstudyingancientDNAasaPh.D.studentbackin,oneofhiscolleaguessuggestedworkingonlemmings（旅鼠）,thetinyarcticrodentsand90svideogameicons."Everyoneisdoingmammoths（猛犸象）,"shetoldDalén,"itsvery

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