I've never been exactly sure of how the universe came to be—big bang boom thang a lang—but I'm certainly glad it shaped out the way it has. If you want to finally understand the beginnings of our universe, watch the video by CERN physicist Tom Whyntie above. Cosmologists and particle physicists try to trace back our universe's footsteps by replicating the heat, energy and activity of the first few seconds right after the Big Bang. [TED-Ed via Geekosystem]