David Grinspoon is a senior scientist at the Planetary Science Institute. He serves on the science teams for several active and proposed interplanetary spacecraft missions. In 2013 he was appointed as the inaugural chair of astrobiology at the U.S. Library of Congress. His latest book, Earth in Human Hands, was published in December. Also a musician, he plays guitar for the House Band of the Universe. @DrFunkySpoon.
