What Is the Multiverse? Quantum Physics Explained

What is the multiverse? David Kaiser, a physicist at MIT, explains that in quantum theory, multiverse is often associated with the many-worlds interpretation. This states that any possible outcome is possible across a proliferating tree of worlds. So, if you flip a coin, both outcomes are true in so much that in one branching world the outcome was heads, and in another branching world the outcome was tails.