If you consider that the Milky Way galaxy has a radius of 100,000 light-years (1 light-year is 9.5 trillion km), and it's estimated that there are 100 to 200 billion galaxies in the Universe, we're living in an unfathomably gigantic place. But what if this was just a fraction of what's truly out there? What if our Universe is just one of many, and they're all bouncing off of each other like mind-numbingly gargantuan marbles, each with their own weird laws of physics? Welcome to the multiverse, where our Universe could be just one of the infinite numbers of universes that were spawned by the Big Bang. As the latest episode of Life Noggin explains, it's widely believed that a mere fraction a second after the Big Bang, our Universe expanded incredibly quickly - a period known as inflation - and then stopped. It's been expanding ever since, but nowhere near as fast. And there's reason to believe that there could be pockets of space out there that never stopped inflating after the Big Bang,