The "relief" zipper on a drysuit is surely one of the greatest humanitarian inventions of the last 150 years. Who can begin to imagine the millions of divers and kayakers and sailors whose lives have been enriched by this innovation? So today, on his 132nd birthday, let us pause and give thanks for the life of Gideon Sundback. He may not have actually invented the zipper but he was the one who perfected it. In his honor, Google have a doodle today that lets you unzip the page to reveal everything you never knew you wanted to know about the Mr. Sundback and his toothy device.