If you're familiar with the original definition of "meme," you know that ideas can spread and mutate. But what makes memes spread faster? Anger. Here's a video that explores how "angry thought germs" can spread, and reinforce opposing viewpoints.
You may have read The Lord of the Rings and/or seen the movies, but do you understand what's going on with those titular pieces of jewelry? This video offers a quick explanation of the various rings in J.R.R. Tolkien's universe, especially the One Ring.
If you haven't dived into the pages of The Silmarillion, there's a whole cosmology of J.R.R. Tolkien's Middle-earth that you may not know. This short video outlines the basics, explaining as much about the universe's divine and angelic beings as you can learn in four minutes.
If you think it's just a joke that robots are going to replace humans, it's not. It's going to happen. In fact, CGP Grey explains in 'Humans Need Not Apply' how it's already happening around us right now. You might not notice it but you will after you watch how we're following historical patterns towards obscurity.
You know how you're related to your grandparents, and you can easily trace the family lineage separating you from you nieces and nephews, but what about the link between you and your great grand uncle? And where do you reside on your family tree relative to your first, second and third (and zero-th) cousins?
The most interesting thing you'll watch today is this video about the geographic border between Canada and the ol' U.S. of A. Yes, really.