In this companion to the third Cosmos television series, produced by National Geographic in 2020, Ann Druyan documents where humanity has been and where it is going. From the emergence of life at deep-sea vents to solar-powered starships sailing through the galaxy, from the Big Bang to the intricacies of intelligence in many lifeforms, Druyan carries on the message of her late husband Carl Sagan, with whom she collaborated on the original Cosmos series in 1980. Her optimistic account of mankind's trajectory features dozens of photos encompassing cave art, scientific milestones, natural wonders, and the glories of our universe.