Our Mathematical Universe is a journey to explore the mysteries uncovered by cosmology and discover reality’s nature. Our Big Bang, our distant future, parallel worlds, the sub-atomic and intergalactic – none of them are what they seem. But there is a way to understand this immense strangeness – mathematics. Seeking an answer to the fundamental puzzle of why our universe seems so mathematical, Tegmark proposes a radical idea: that our physical world is not only described by mathematics but that it is mathematics. This may offer answers to our deepest questions: How large is reality? What is everything made of? Why is our universe the way it is?