By Wayne Heideman
Do you remember what it was like on your first day of kindergarten, college, or work? You were placed into an environment that was different than the one you had known previously, whether it was because of the people, place, or experiences. Around 3.1 million years ago, this is what North America and South America, provided they had feelings, would have felt when they became connected via the Panama isthmus. Not only did it connect two continents, but it connected the organisms that inhabited the two continents.