 In February 2012, the Icelandic national broadcaster, RÚV, published a video thought to show the Lagarfljót Worm swimming in snow-covered icy water.But according to a frame-by-frame analysis of the footage by Finland-based researcher Miisa McKeown, the filmed object actually made no progress through the water, although optical illusion made it appear to propel forward.The phenomenon could be explained by a flimsy inanimate object (such as a frozen fish net) being moved by rapid current.