Here's a fun fact: potatoes actually belong to the same family as tobacco. But don't worry, they're not harmful to your health like smoking is! However, you should be careful not to eat a potato that's gone green. Green potatoes can contain a harmful toxin called solanine, which can cause nausea and vomiting. Speaking of the Incas, did you know that they had more than one use for their potatoes? They not only ate them, but they also used them for medicinal purposes and even as currency.