Cosmic Architecture: Mapping the Universe’s Design, Part 1 of 2

You can see that the contents of the universe are divided up into very uneven pieces. All the stuff I’ve talked about is what we call “normal matter.” It’s the stuff we can see in the universe, it’s the stuff we can detect, it’s the stuff that we see with telescopes and our eyes, it’s you and me. That only makes up about 5% of the universe. And we’ve known for the better part of a century now that most of the matter in the universe is “dark matter.”