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Are We Alone in the Universe?
How can we know if life exists elsewhere in the cosmos? To answer that question, we have to place Earth — and Earth life — in the context of other worlds in the Solar System and beyond. In my latest comic for The Nib with Maki Naro, we look at the science of planetary chemistry and the conditions of habitability as we know them, with the help of Johns Hopkins astrochemist Sarah Hörst and American Astronomical Society Public Policy Fellow Ashlee Wilkins.