The question become particularly intriguing when we realize that astronomers now estimate that the Milky Way galaxy alone may harbor as many as 4.5 billion Earth-sized planets in the "habitable zones" around their host stars.
If our Milky Way galaxy and the universe at large are indeed teeming with intelligent extraterrestrial (ET) civilizations, why haven't we seen any sign of them yet? In other words, where are they? This mystery has become known as the "Fermi paradox."
From intelligent alien life to our stellar origins, how to think outside of the three-dimensional box to what baffles one of the great thinkers of our time, this was a conversation I won't soon forget.