North and South America were arranged in nearly the same positions as they are today as far back as 20 million years ago. A significant difference was that they were separated by a deep open channel called the Central American Seaway.
Hundreds of millions of years ago the continents were joined together in a super-continent that scientists call Pangaea. It means “all lands” in Greek. It stretched all the way from the North to the South Pole, but that’s not the way the earth looks now, obviously. What happened? Learn more on this Moment of Science.