Imagined Life: A Speculative Scientific Journey among the Exoplanets in Search of Intelligent Aliens, Ice Creatures, and Supergravity Animals

“It’s speculating about alternative biologies. The problem is that we have just one example of biology, the one that happened on Earth. Everything on Earth—from a fungal spore to a blue whale, to a redwood tree—is the same biological experiment. We don’t know what a different biological experiment would lead to, or what the creatures and life forms that emerge would look like. If you vary from the one example we know, you’re immediately in the realm of pure speculation. It’s a tricky business because we simply don’t know. I enjoyed the book. I did have a little asterisk in my head as I read it saying, ‘Wait a minute! We don’t know that that could happen or that it would be like that!’” Read more...

The best books on Exoplanets

Chris Impey, Scientist