Michio Kaku On Aliens On Physics and the why we have not found them.
Theoretical physicist and 2057 host Michio Kaku speculates on the future of civilization. He uses The Kardashev scale to explain his speculations. The Kardashev scale is a method of measuring a civilization’s level of technological advancement. The scale is only theoretical and in terms of an actual civilization highly speculative; however, it puts energy consumption [...]