How did sweet potatoes end up in South America and Polynesia? And how did bottle gourds come from Africa to South America?

by klinklonfoonyak

Is it thought to be from an unknown natural process or from unknown human trade routes? I could imagine maybe bottle gourds floated from africa to South America, but the sweet potato thing stumps me

Mictlantecuhtli

There's always room for discussion, but perhaps this previous topic will answer part of your inquiry.