In this podcast, hear from MIT's Eric Lander and Li-Huei Tsai about new experiments that are exploring whether "lost" memories can be regained.Podcast produced by David Levin. Interview by Betsey Arledge and Peter Standring. Music by www.animalhospital.com. NOVA is produced by WGBH in Boston.Major funding for NOVA scienceNOW is provided by the National Science Foundation and the Howard Hughes Medical Institute. Additional funding is provided by the Alfred P. Sloan Foundation.This material is based upon work supported by the National Science Foundation under Grant No. 0229297. Any opinions, findings, and conclusions or recommendations expressed in this material are those of the authors and do not necessarily reflect the views of the National Science Foundation.For more fun science stories, visit our Web site at http://pbs.org/nova/sciencenow