Guest: Janna Levin.

Is the universe infinite or just really big? In her new book How the Universe Got its Spots, cosmologist Janna Levin synthesizes areas of science from geometry to string theory to explain how the patterns left in the universe by the Big Bang may one day be used by scientists to reveal the exact size and shape of the universe. She joins us today on Focus to discuss her book and her day-to-day life as a physicist exploring this area of her field.