As part of the two-day celebration of the 15th anniversary of the John W. Kluge Center at the Library of Congress, seven 10-minute rapid-fire "lightning conversations" (followed by 20 minutes of moderated Q&A) covered definitions of life in the 21st century and beyond. For transcript, captions, and more information, visit www.loc.gov/today/cyberlc/feature_wdesc.php?rec=6745