What happened in this episode?
In this wide-ranging conversation, host Steven Bartlett interviews legendary theoretical physicist Dr. Michio Kaku, co-founder of string field theory and author of multiple books on the physics of the future. The episode centers on humanity's biggest unanswered questions: where we came from, whether we're alone in the universe, and what the future holds as transformative technologies reshape civilization. Kaku, who has spent 71 years studying physics since age eight, opens by explaining string theory—his life's work attempting to complete Einstein's dream of a unified theory of everything. He describes the universe as originating from a Big Bang roughly 14 billion years ago, potentially part of a "bubble bath" multiverse where countless universes coexist in 11-dimensional space. Addressing recent declassified UFO files released by President Trump, Kaku states he found no smoking gun evidence but remains open-minded, theorizing that any visiting craft would likely be robotic rather than biological given the extreme forces involved. He warns that quantum computers pose an existential threat to digital security and could crack Bitcoin and all known encryption within decades, prompting urgent CIA concern. On artificial intelligence, Kaku predicts menial jobs will vanish but argues true creativity remains beyond current AI capabilities, though he advocates for humans merging with machines to remain competitive. He reveals that scientists have identified telomeres and telomerase as the keys to potential human immortality, but the same mechanism is exploited by cancer cells. Throughout, Kaku reflects on how his two years in the U.S. Army during the Vietnam War era fundamentally changed his worldview, teaching him that morality and meaning are not universal but constructed by individuals and cultures. He remains agnostic about God, viewing religion as evolutionary "glue" that holds intelligent societies together when pure reason fails.
