Pressed for time, so I'll have to watch and read the post a little better later.
But Yeah. There's speculation that people's from advanced civilizations all over the planet have been to the Americas before Columbus.
In the 1070's a guy made a Chinese Junk boat and almost did it from Hong Kong. He had worms eating the wood of the boat. I think he attempted it later and managed to make it. They base a lot of these theories on pre-columbian artifacts. From Toltec head sculptures in Guatemala that look Chinese to Eastern Amazon tribes making things that look Phoenician.