>>941119754
He didn't discover a route across it.
People made journeys across it regularly, it was wrongly believed to be perilous. He was the most publicized case of someone going and making it back unharmed multiple times, and so people realized it wasn't dangerous.
No, no one back then called it the "Columbian exchange" because that term was invented in the 1970s.
No, he didn't discover a trade route. He didn't even discover a route. He just took multiple paths in the direction, and didn't die.
If you look at maps he drew, you can see he left from like 4 different ports, and landed in different places every time. He didn't take note of his exact or even approximate path, because, newsflash, he didn't have a cartographer.
If you are thinking of those maps you see online showing his hypothetical paths, they're all conjecture, good job you didn't read anything you thought you did.
Please tell me more contributions you wrongly believe belong to Columbus.