New York's 92nd Street Y and msnbc have gathered 16 world shakers—from the profound to the popular, from scientists to celebrities—and placed them head-to-head in one very varied bracket. Genius indeed takes many forms, and which kind will triumph comes down to you. Who’s the Ultimate Genius? Cast your vote now!
Round 1: Feb 9 to Feb 15
Round 2: Feb 16 to Feb 22
Semi-finals: Feb 23 to Mar 1
Finals: Mar 2 to Mar 8
The ultimate genius showdown: you decide