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  • 简介:Inanother250millionyears,AmericanswillbeabletodrivetoAfrica.Bythattime,Earth'ssevencontinentswillhavemerged(?)intoonesupercontinent,predictsChristopherScotese,ageologistattheUniversityofTexasatArlington.Itwon'tbethefirsttimethecontinentshavegotten-together;aboutthesameamountoftime

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