exploration By micahjmathis02 Sep 1, 1492 Christophur Columbus In 1492, Christophur startes his expdisen to find a way to rech Asta. Sep 3, 1497 vasco da gama In 1497-1498, Portuguese exxplorer Vasco da Gama found such a route Sep 3, 1497 John Cabot In 1497 king henry