Wright Brothers Flight Anniversary Special: Dr. Yu Demonstrates Antigravity

Physicist Dr. Weiping Yu returns and joins David Gornoski in a fascinating conversation looking back at the Wright Brothers’ first flight and more. What do we make of the UFO phenomenon from a technological perspective? Do we really need concepts like gravity and dark energy to make sense of the solar system as some theories suggest? Is the universe expanding? Is it possible to make safe antigravity transportation devices for human beings?