Frequently Asked Questions about the Universe

"Delightful, funny, and yet rigorous and intelligent: only Jorge and Daniel can reach this exquisite balance." —Carlo Rovelli, author of Seven Brief Lessons on Physics and Helgoland

You’ve got questions: about space, time, gravity, and the odds of meeting your older self inside a wormhole. All the answers you need are right here.

As a species, we may not agree on much, but one thing brings us all together: a need to know. We all wonder, and deep down we all have the same big questions. Why ca...