Astrophysicist Neil deGrasse Tyson kicked off the House Science & National Labs Caucus with a lecture at the Library of Congress.

Speaker Biography: Neil deGrasse Tyson is an American astrophysicist and science communicator. He is currently the Frederick P. Rose Director of the Hayden Planetarium at the Rose Center for Earth and Space and a research associate in the department of astrophysics at the American Museum of Natural History. He has appeared on or hosted several television programs promoting science and space exploration.

For captions, transcript, and more information, visit http://www.loc.gov/today/cyberlc/feat....