Ever wondered how 4/20 became 420? Many urban legends have surfaced over the years as to how 420 (April 20) became the nations weed holiday. Well, Yahoo dove head first into these cloudy myths to see what’s true and what’s not. In the video, we learn that the real truth about how 420 all got started can be traced back to four college kids, searching for a cannabis farm in California. Go figure! Watch the video above to learn more.