The Big Bang Theory Explained


The Big Bang Theory is a commonly misunderstood concept. Most people think of it as the moment that the universe “exploded” and came into existence. The reality is much more complicated.

The term “The Big Bang” is silent about what caused the sudden expansion—instead, it describes everything that happened after that. Since the universe is still expanding, in a very real sense, the Big Bang is still going on. In this video, Great Courses instructor Dr. Don Lincoln explains the science behind why we think the Big Bang is real.

Video Courtesy Fermilab

Watch Don Lincoln’s lecture series The Theory of Everything: The Quest to Explain All Reality at The Great Courses Plus. Start your free trial now.


  1. According to Big Bang Theory, all the mater came from one
    “Singularity.” Then logically there couldn’t be different galaxy with vast distances between them. Instead the stars should spread relatively even in the space of the whole universe.

Comments are closed.