Since at least the Age of Exploration, Africa has been referred to as "the Dark Continent." It's, naturally, a dated and controversial term, though to me, it refers to the mysterious interior of the continent, which wasn't seen by European eyes until the 19th Century. But in this podcaster's opinion, it's a moniker that could just as easily be applied to South America, whose Amazonia region in Brazil wasn't even fully mapped until the 20th Century, a feat achieved by none other than former American president Theodore Roosevelt. Tune in to find out how he did and what transpired on that fateful expedition!