Art Bell welcomes Professor Michio Kaku, theoretical physicist at the City University of New York and co-founder of string field theory, for a sweeping conversation that moves from the nature of gravity to the possibility of time travel and the future of human civilization.
Kaku explains Einstein's revolutionary insight that gravity is not a pulling force but rather the effect of mass bending the fabric of space, using the analogy of a fat actor warping a trampoline stage. He describes how string theory extends this into 10 and 11 dimensions, with the latest M-theory suggesting that our entire universe exists on the surface of a bubble in a boiling multiverse where Big Bangs happen constantly. The discussion covers wormholes as shortcuts through space, the Casimir effect as laboratory evidence of negative energy, and the hypothetical negative matter that could serve as fuel for a time machine. Kaku outlines the Kardashev scale of civilizations, classifying humanity as a primitive Type 0 that burns dead plants for energy, roughly 100 to 200 years from achieving Type 1 planetary status.
Art challenges Kaku on whether advanced civilizations would necessarily be peaceful, and Kaku responds with the sobering observation that the real danger lies in whether Type 0 civilizations can survive their own nuclear weapons and pollution long enough to evolve.
