Synchronized swimming has never looked so good thanks to the Twinscam, invented by Japanese broadcaster NHK in 2010, simultaneously showing swimmer's torsos above water and their legs below it. A solution to a common problem in water events, that because of the way light refracts and reflects differently above and below water, heavy image processing needed for a camera to do both, we've only been able to see shots that show one point of view at a time. The Twinscam does it simply by using two cameras, one above and one below, and then combining the feeds to make it look like one shot. Read more here on Slate