With 244 steps
The Time Machine, built by by members of the Purdue Society of Professional Engineers and Society of Hispanic Professional Engineers, took first place and broke a world record at the
24th Annual National Rube Goldberg Machine Contest. From the article: "It starts with the Big Bang, re-creates the extinction of the dinosaurs, holds a jousting competition, flips over an album, and simulates World War II, a shuttle launch, the fall of the Berlin Wall, and even the alleged apocalypse in 2012. In its precisely executed review of history, 'The Time Machine,' a Rube Goldberg contraption built by members of the Purdue Society of Professional Engineers and Society of Hispanic Professional Engineers, incorporates a record-breaking 244 steps—all to water a single flower."