Publisher's Synopsis
For thousands of years, humans have wondered whether we're alone in the cosmos. Now we have the technology to investigate. But once you look for life elsewhere, you realise it is not so simple. How do you find it over cosmic distances? What actually is life? As founding director of Cornell University's Carl Sagan Institute, astrophysicist Lisa Kaltenegger has built a team of tenacious scientists from many disciplines to create a specialised toolkit to find life on faraway worlds. In 'Alien Earths', she demonstrates how we can use our homeworld as a Rosetta Stone, creatively analysing Earth's history and its astonishing biosphere to inform this search.
