Alien Earths

In the grand tradition of Carl Sagan and Neil deGrasse Tyson, we now have a new tour guide to the cosmos. Professor Lisa Kaltenegger takes us along on the quest to solve one of the greatest mysteries of existence: are we alone in the universe? In Alien Earths, Kaltenegger - one of the pioneers leading the way - reveals what we've already discovered, and even more breathtakingly, what we might find.

Steven Strogatz, author of Infinite Powers

The odds are overwhelming that something's alive out there. But will we ever see a sign of life on a planet circling a distant star? And, if we do, will we recognize it? This fascinating and tantalizing book points the way to YES.

Alan Alda

Do you want to prepare yourself for the next 'Copernican revolution'? Then read Lisa Kaltenegger's book! Fascinating.

Michel Mayor, Winner of the Nobel Prize in Physics

Effervescent with ideas and edge-of-your-seat discoveries, Alien Earths provides a front-row seat to the astonishing era we live.

Caleb Scharf, Director of Astrobiology, Columbia University, author of "The Zoomable Universe"

Lisa Kaltenegger is an international leader in the discovery and analysis of exoplanets...Moreover, she is a brilliant expositor. I eagerly await what will surely be a riveting book.

Lord Martin Rees, Astronomer Royal

An erudite and highly readable inside view of the science and emerging discoveries of this remarkable new era.

Charles Cockell, author of "Taxis from Another Planet"

Lisa Kaltenegger is in the best possible position to offer this timely and accessible overview of the rapidly evolving and exciting field of exoplanets, expertly illuminating the questions we have begun to answer, and the many that we can expect to be resolved in the years and decades to come. Linking our understanding of alien worlds (and the possibility of life) to the grand story of Earth's own past, this is an engaging and personal book that couldn't be more up to date. Read ALIEN EARTHs, and feel your cosmic perspective shift just a little on its axis.

Alastair Reynolds, science fiction writer and former ESA scientist

In Kaltenegger’s exhilarating exploration of the state of the Earth-hunting art, she welcomes us into the latest strategies for finding life at interstellar distances. Kaltenegger is that precious rarity, a leading scientist with an infectious passion for her subject and the talent to connect. Read this book and then gaze up at the night sky to find the stars sparkling even brighter with possibility.

Ann Druyan, co-creator of Contact, co-writer COSMOS

In Alien Earths, Lisa Kaltenegger, a skillful educator, offers first-hand access to her expertise on the search for planets in the universe, and the life they may contain. Along the way, Lisa's breezy narrative style invites you to experience with her the challenges and joys of being a scientist on the frontier of discovery.

Neil deGrasse Tyson, Astrophysicist, American Museum of Natural History

If you’ve ever wondered if we’re alone in the cosmos— and Dr. Kaltenegger is certain you have, start with Alien Earths. With her combined degrees in astronomy and engineering, she presents a primer on the geology, physics, chemistry, biology, and ultimately mathematics of places just like Earth— which she sets about seeking every (Earth) day. She learned the rudiments of extraterrestrial lifestyles, while overcoming no shortage of sexism. Could there be alien others out there wondering what it took for life to get a start on our special world? She’ll show you; the answer is in the sky, our window on the cosmos. Read on!

Bill Nye, CEO, The Planetary Society (and former student of Carl Sagan)

What a fascinating glimpse into the creative work of exobiologists, humankind's exciting search for life elsewhere in the universe, and the tantalizing facts we've learned thus far. I was enchanted

Diane Ackerman, author of The Zookeeper's Wife

This Austrian astrophysicist, a world leader in the accelerating search for extraterrestrial life, takes us on a vivid trip through the cosmos, explaining how scientists are using technology to detect hints of activity on distant planets

Ben Spencer, The Times Best Science Books of 2024