Renowned climate scientist Dr. Jagadish Shukla discusses his new book, "A Billion Butterflies: A Life in Climate and Chaos Theory." Widely praised as an inspiring and informative memoir, the book shares Dr. Shukla's groundbreaking work, which revolutionized weather forecasting. Then naturalist and photographer Charles Hood captures his nocturnal adventures all over the world in his new book, "Nature at Night." While most tales may warn us about the dangers that lie waiting in the dark, there is actually an abundance of thriving, colorful and even adorable creatures that live their best lives at night.