As spacecraft plunge deeper, accelerators split atoms, and telescopes capture signals billions of years old, our understanding of the universe and our place in it keeps changing in revolutionary ways. In this intriguing book, Neil deGrasse Tyson brings the newest ideas of astrophysics to answer philosophy's perennial questions-How did we get here? Are we alone? How do we know? Building on the wisdom of the ancients, from Eratosthenes to Galileo, and explaining the most significant science of today, such as the discovery of exoplanets and identification of subnuclear particles. Tyson guides us with his trademark wit and humor on a journey from past to future, from the tiniest to the most colossal, from the frontiers of our knowledge into the vast unknown-always encouraging us, as he puts it, to keep looking up. Book jacket.