1) The document summarizes presentations given by Beau Lotto, a neuroscientist, and Amy O'Toole, the world's youngest published scientist and youngest presenter on TED. 2) Beau engaged the audience with a demonstration of perception and introduced Amy, explaining her accomplishments as a young scientist. 3) The reviewer rated Beau's dynamism as a 5 and Amy's as a 4, and felt they were both great speakers who kept the audience's attention through informative and interesting content.