PRINCETON, NEW JERSEY — More than a quarter million gamers have helped one of America's leading universities find out more about neurons.<br /><br />The Princeton University Eyewire project by saw 265,000 gamers help map more than 3,000 neural cells into a digital museum, the institution wrote in a news release. <br /><br />Researchers had players tracing out the structures from ganglion cells in a mouse's eye. Princeton research scholar Shang Mu said these cells are the connection between the retina and the brain. Gamers mapped this by coloring 10 million 3D cubes. <br /><br />These cubes, according to Princeton University, are 4.5 microns across, meaning a 10-by-10 block is the width of a human hair. All mapped cells are verified by up to 25 other gamers, and once it's complete they're entered into the Eyewire museum.