Christopher Columbus in 1492, but there was a viking Leif Ericson that is thought (not proved) to find it in the early 1000's, Here is a little song i learned in 2nd grade:
In 1492,
Columbus sailed the ocean blue'
In three ships he sailed from Spain
He sailed through sunshine wind and rain,
etc etc.
Hope this helps
Technically, Colombus.
north America
The English
g.s.tiwari
Star Search
Pythagoras
john blue
Benjamin discorved electricity
Argentina was discovered in 1516 and 1526.
it was discorved in 1996
it was discorved in 1996
Columbus discorved lands
Galileo Galilei discorved Saturn 1610.