Her research on puzzles riddled with delight

He had her at … the Sphinx rid­dle. When the pro­fes­sor of a first-year course on puz­zles at the Uni­ver­si­ty of Toron­to sprang this ancient brain­teas­er on his class — what starts on four legs, then goes on two, then ends on three? — the girl who loved puz­zles start­ed to believe this could be a career. Read more…