This July 4th can explain everything. And I mean EVERYTHING, as in how the universe works. Scientists have been puzzeld for decades as to why some particles have mass and some don't, and they have hypotehsized the existence of something known as the Higgs Boson particle that would explain why. It's rumored that scientists will announce the discovery of the Higgs Boson, or "God particle", on July 4th.
Ezra Klein made me SO happy by geeking out and going into the importance of the Higgs boson. It's a great primer - check it out!
There are many other videos on the history of the Higgs boson on a very helpful MSNBC page.
The Minute Physics YouTube channel that Ezra refers to is also beyond awesome. Here's a quick one, which covers the equation called the Standard Model that predicts the existence of the Higgs Boson: