Books

If you are looking for a new book to read, you might want to check out The Giant Leap by Caleb Scharf, who is director of astrobiology at Columbia University and the senior scientist for astrobiology at NASA’s Ames Research Center.

Here is a quick blurb from the publisher:

The story of life has always been one of great transitions, of crossing new frontiers. The dawn of life itself is one; so, too, is the first time two cells stuck together rather than drifting apart. And perhaps most dramatic were the moves from the sea to land, land to air. Each transition has witnessed wild storms of innovation, opportunity, and hazard. It might seem that there are no more realms for life to venture. But there is one: space.

In The Giant Leap, astrobiologist Caleb Scharf argues that our journey into space isn’t simply a giant leap for humankind—it’s life’s next great transition, an evolution of evolution itself. Humans and our technology are catalysts for an interplanetary transformation, marking a disruption in the story of life as fundamental as life’s movement from sea to land, and land to sky.

Inspired by Darwin’s account of his journey on the Beagle, and packed with stories from the past, present, and future of space travel, The Giant Leap thrills at both life’s creativity and the marvels of technology that have propelled us into the cosmos. And it offers an awesome glimpse of the grander vistas that wait in the great beyond.

Scientific American magazine interviewed the author to learn more about his views. One of the questions related to settling on Mars, which the author did not view as a best option for expanding outward into our Solar System:

We definitely need to study Mars and the moon, and maybe some of us should even try to live there. I mean, there’s all sorts of genuine reasons for doing that. But in the long term, it’s far better to engineer what you really need—to create environments that place fewer stressors on life that evolved on Earth over four billion years. Even if you build fabulous habitats on the moon or Mars, you’ll never have Earth-normal gravity in those places, for example.

Whether you make use of a natural object such as an asteroid or just construct an entirely artificial habitat out there, both would give you far more options than a planetary surface. You can spin your habitat to get Earth-like artificial gravity; you can engineer a lovely atmosphere that precisely fits our biological needs. You can set up seasons, choose where to orbit and have robust protection from cosmic radiation.

The interview covers a range of questions that delve into parts of the book. You may want to start with the interview before deciding to go further. It is a great launching point.