“I have read that cocaine and tobacco, known only in the Americas, was detected in the mummy of Ramses II aka Ramses the great.
This would imply that there was some sort of contact between Egypt and the Americas from around 2000 BC - at least.
People did get around by boat in extreme antiquity.”
I wish that was true for sure but there is question. While I absolutely believe they were seafaring way back then, the Cocaine Mummy has purportedly been debunked. They claim that there is a similar edible plant in the old world that also tests positive as Cocaine. Apparently it is supposed to be like the the Poppy seed muffin situation where simple Poppy seeds test positive as opiates.
That is the story anyway...
But then there is this... Cuneiform in ancient South America.
http://solomonsblondes.blogspot.com/2016/07/cuneiform-bowl-from-bolivia-crespi.html
“.... the Cocaine Mummy has purportedly been debunked.”
One has to be cautious about the debunkers. There was also tobacco found in the mummy, again only source from Americas.