Ep 2. How to Travel to a Parallel Universe

In this episode of Sci-Fi Science: Physics of the Impossible, titled "How to Travel to a Parallel Universe," host Michio Kaku explores the fascinating idea of parallel universes and the possibility of traveling between them.

Kaku begins by explaining the concept of a parallel universe, which refers to a theoretical universe that exists alongside our own, but with slight differences in the way events unfold. He notes that this idea has been explored in science fiction for decades, but suggests that there may be some scientific basis for the idea.

To delve further into the concept of parallel universes, Kaku explores the concept of quantum mechanics, which describes the behavior of particles at a subatomic level. According to quantum mechanics, particles can exist in multiple states at once, which has led some scientists to speculate that multiple universes may exist simultaneously.

Kaku then introduces the concept of the multiverse, which suggests that there may be an infinite number of parallel universes existing alongside our own. He notes that this idea is still purely theoretical, but suggests that if it were true, it could open up incredible possibilities for space exploration and the search for extraterrestrial life.

The bulk of the episode is devoted to exploring the different ways that scientists have proposed for traveling to a parallel universe. Kaku begins by examining the concept of wormholes, which are hypothetical structures that could theoretically connect different points in space and time. He notes that while the existence of wormholes is still uncertain, if they did exist, they could potentially provide a way to travel to a parallel universe.

Kaku then discusses the idea of using quantum mechanics to travel to a parallel universe. He explains that at a subatomic level, particles can exist in multiple states at once, a concept known as superposition. This has led some scientists to speculate that it may be possible to create a machine that could manipulate superposition and travel to a parallel universe.

The final segment of the episode focuses on the concept of the mirror universe, which is a theoretical parallel universe where fundamental physical laws are reversed. Kaku notes that while the mirror universe is purely hypothetical, it has been explored in science fiction for decades, most notably in the Star Trek franchise. He examines the ways in which the mirror universe has been portrayed in Star Trek, and suggests that if it did exist, it would offer some unique and challenging opportunities for exploration.

Overall, "How to Travel to a Parallel Universe" is a fascinating exploration of a perennially popular science fiction concept. Kaku does an excellent job of explaining the scientific basis for the idea of parallel universes, as well as examining the different ways that scientists have proposed for traveling between them. Whether you're a science fiction fan or simply interested in the cutting-edge of theoretical physics, this episode is definitely worth a watch.