Adventure Is Out There

WHY WOULD anyone want to live on Mars? As even enthusiasts for a Martian colony would admit, it would be at best like living permanently in a shopping mall.

- BY STEVEN POOLE

But for Caleb Scharf, an astrobiologist at the National Aeronautics and Space Administration, a future of space colonization is written in the stars. Life has arisen, magically, on Earth; it has become intelligent and started to explore the worlds