Updated timelines

American Republic
omniEffect
Christopher Columbus's Journey in 1492
Native American Exploration
Exploring the Americas
Columbus's first voyage
Columbus's voyage in 1492
Helen Keller
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Famille Tranchant
Bosscher-Hammond Prize Competition
repressel
history of short film
Crise financiere
zengxianhong
Evolucion das Tecnoloxias da Informacion