The Skeptics Society & Skeptic magazine

In this special dual lecture event, Venderbilt University astronomer David Weintraub explains how old the universe is and how we know in an enthusiastic way. Following that lecture, Dr. Shing-Tung Yau tells the story of “Calabi-Yau manifolds,” — one of the smallest things you can possibly imagine — six-dimensional geometric spaces that may be more than a trillion times smaller than an electron. They might also be one of the defining features of our universe!