Renowned planet hunter and University of California, Berkeley Professor Geoffrey Marcy, whose research team has discovered more than 100 planets outside the solar system, will speak at the University of Colorado at Boulder on April 6. Marcy will speak at 7:30 p.m. in Macky Auditorium in a free, public lecture titled "New Worlds, Yellowstone, and Life in the Universe." In his presentation, Marcy will address the possibility of habitable worlds beyond the solar system.