Noam Chomsky and Lawrence Krauss tackle five fundamental mysteries at the forefront of science today: Time, Space, Matter, Life, and Consciousness.

Three of the most important words in science are ‘I don’t know’. Not knowing implies a universe of opportunities – the possibility of discovery and surprise. Our understanding of cosmology has advanced immeasurably over the last five hundred years of modern science, yet many fundamental mysteries of existence persist. How did our Universe begin, if it even had a beginning? How big is it? What’s at the bottom of a black hole? How did life on Earth arise? Are we alone? Is time travel possible? What is consciousness, and can we create it?

In this unique conversation, philosopher and cognitive scientist Noam Chomsky and theoretical physicist Lawrence Krauss delve deep into these questions, exploring the topics that will shape the state of science for the next century. These mysteries define the scientific forefront—the threshold of the unknown. To explore that threshold is to gain a deeper understanding of just how far science has progressed.