NtwoO writes: Tech junky Greg Kolodziejzyk broke the 24 hour world human powered boat record in his preperation to pedal across the Atlantic. Greg has a history of cool projects with impressive outcomes. His previous endevour was a bicycle that was used to break the 24 hour cycling record for fully faired bicycles. Greg goes through a thorough design process when building his projects.
We warn the reader in advance that the proof presented here depends on a
clever but highly unmotivated trick.
-- Howard Anton, "Elementary Linear Algebra"