The Biological Universe:
Life in the Milky Way and Beyond

The Biological UniverseCambridge University Press, 2020, 255 pp., Hardcover. $24.95.

Are we alone in the universe, or are there other life forms “out there”? This is one of the most scientifically and philosophically important questions that humanity can ask. Now, in the early 2020s, we are tantalizingly close to an answer. As this book shows, the answer will almost certainly be that life forms are to be found across the Milky Way and beyond. They will be thinly spread, to be sure, yet the number of inhabited planets probably runs into the trillions. Some are close enough for us to detect evidence of life by analyzing their atmospheres. This evidence may be found within a couple of decades. Its arrival will be momentous. But even before its arrival, we can anticipate what life elsewhere will be like by examining the ecology and evolution of life on Earth. This book considers the current state of play in relation to these titanic issues.

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