tidal heating

Book review – Life in the Cosmos: From Biosignatures to Technosignatures

8-minute read

Are we alone in the universe? For the moment, this question remains unanswered, though there are many ways to tackle it. Just how many was something I did not appreciate until I sunk my teeth into Harvard University Press’s new flagship astronomy title Life in the Cosmos. Written by astrobiologist Manasvi Lingam and theoretical physicist Abraham “Avi” Loeb, this is a book of truly colossal proportions, clocking in at over 1000 pages. It boldly goes where few academic books have gone before by seriously and open-mindedly considering the possibility of extraterrestrial technological intelligence on par with, or far beyond humans. I found myself gravitating towards this book on account of more than just its size.

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Book review – Alien Oceans: The Search for Life in the Depths of Space

8-minute read

This is the second of a two-part dive into the story of oceans on Earth and elsewhere, following my review of Ocean Worlds. That book gave a deep history of how our oceans shaped Earth and life on it and briefly dipped its toes into the topic of oceans beyond Earth. Alien Oceans is the logical follow-up. How did we figure out that there are oceans elsewhere? And would such worlds be hospitable to life? Those are the two big questions at the heart of this book. If there is one person fit to answer them, it is Kevin Peter Hand, a scientist at NASA’s Jet Propulsion Laboratory and their deputy chief for solar system exploration.

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