While this video is a little dry (it was filmed during a university lecture), it is helpful in grasping the implications of the Borde-Vilenkin-Guth (BVG) Theorem. Notice at about the 3 minute mark the BVG Theorem explicitly stated. In layman’s terms, Dr. Vilenkin is saying that a time traveler moving forward in time notices that her travel relative to the expansion of particles in spacetime slows down (which is red shift) and that, if she were to move backwards in time (towards the Singularity), it would speed up (blue shift). Since nothing travels faster than the speed of light, she cannot travel infinitely backwards in time because, at some point, she will reach the speed of light. Therefore, the expansion of spacetime itself had a beginning in the finite past.

Notice also, at around 5:45, Vilenkin’s comments on other inflationay models that attempt to evade the BVG Theorem.

Speaker, Educator, President of A Clear Lens, Inc. and host of A Clear Lens Podcast. B.Sc., M.Ed. Lives in Las Vegas with his wife, two sons, and dogs.


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  3. I haven’t had the chance to watch the video yet, but I find it interesting though (by some lady’s video blog that I watched) that the scientists behind this theorem are atheists as well. That is why I believe the Body of Christ needs to stand up and encourage our young people in the sciences.

    Sorry that I got off topic.

    In Christ,

    Jerome Danner