Library of Congress. National Book Festival (U.S.), sponsoring body. moving image eng Avi Loeb discusses "Extraterrestrial: The First Sign of Intelligent Life Beyond Earth" (Houghton Mifflin Harcourt) with science journalist Sarah Scoles. Group name: 2021 National Book Festival: Science. Avi Loeb. Recorded on 2021-09-22. https://hdl.loc.gov/loc.gdc/gdcwebcasts.nbf2021_live_210922_1900