Heroes
Until I saw Bill Nye do it, I wouldn't have believed evolution could be explained with emoticons.
It just doesn't get simpler to follow than this.
12.16.14
If you can watch the video, stop here. If not, keep scrolling.
If you can't watch the video, here's the breakdown.
He starts by explaining that way back in the day, molecules basically hooked up and started reproducing themselves:

