b'2017-2018 YEAR BOOK11Our inquiry into the likelihood of life on exoplanets focuses on the specific characteristics that enabled development of life on Earth, as a means to discern the aspects of an exoplanets geologic history, internal dynamics, and surface conditions that would be necessary for extraterrestrial life to arise and flourish. Through this work, our scientists are engaging with a wide range of profoundly intriguing questions: What kept life at bay on Mars and Venus? Does planetary habitability demand geologic factors such as plate tectonics and magnetic fields? Will astronomers be able to detect hints of these processes on other worlds? By looking at these issues through the lenses of multiple disciplines, Carnegie is helping to define a new approach to the age-Peter Driscoll studies the evolution ofold questions of where, and how, we can seek life on other worlds. Earths core and magnetic field, including magnetic pole reversals. Earths magnetic field (blue) is generated in the core and protects the planet from solar winds harmful solar radiation. This protection is essential for life to exist. Left image courtesy Peter Driscoll; right image courtesy NASA/GSFC'