Answer:
I don't think Native Americans discovered America; I know they did. Heck Colombus, he didn't discover anything. The Native Americans founded this land before it even was America. They built they're land and made it their own. Colombus was the one who came in out of nowhere, saying he had discovered America. Colombus is just straight dookie.
Now, build on from what I said to write your essay so that it isn't plagiarism. Since you're in college or whatever-