How might life evolve on planets much different than Earth? An exploration of the book 'The Teeming Universe' by Christian Cline. Imagine you’re an interstellar traveler. What sorts of alien life might you find out there in the universe? It’s interesting to speculate on how life might evolve in the depths of a planet covered by oceans, or the skies of a world with an atmosphere teeming with floating life. This concept is explored in great scientific detail in The Teeming Universe: an interstellar field guide by speculative author and artist Christian Cline. The book, which I have a link to down below, explores how alien life might evolve on various types of planets much different from our own.