NationalGeographicembarksonanexpeditionintothemysteriousworldofancientAmericanhistorytoshedadifferentlightonthehistoryoftheAmericas. Historybookstraditionallydepictthepre-ColumbusAmericasasapristinewildernesswheresmallnativevillageslivedinharmonywithnature.Butscientificevidencetellsaverydifferentstory:WhenColumbussteppedash...