Do YOU know? Grigori Perelman is widely recognized for solving the Poincaré Conjecture, one of the seven Millennium Prize Problems in mathematics. Born in 1966 in Leningrad (now St. Petersburg, Russia), Perelman's work in topology—particularly his groundbreaking proof of the Poincaré Conjecture—earned him international acclaim. The Poincaré Conjecture, formulated by Henri Poincaré in 1904, was a longstanding puzzle in topology, concerning the characterization of 3-dimensional spaces. Perelman's