About500yearsago,theSpanishexplorerChristopherColumbusp...
问题详情:About500yearsago,theSpanishexplorerChristopherColumbusprovedtheEarthwasround.NowAmericanauthorThomasFriedmantellsustheEarthisflatinhisbestseller:TheWorldIsFlat:ABriefHistoryoftheTwenty-FirstCe...