Why does time move forward?
Caltech theoretical physicist Sean Carroll explains why time moves forward. Read more of Carroll's insights in his latest new book, "The Big Picture," which is now available in paperback.
Follow BI Video: On Twitter
Caltech theoretical physicist Sean Carroll explains why time moves forward. Read more of Carroll's insights in his latest new book, "The Big Picture," which is now available in paperback.
Follow BI Video: On Twitter