Scientists May Have Figured Out , Why Some Sharks, Attack Humans.<br />Research conducted by <br />Australia's Macquarie University found that many <br />shark attacks could be a case of mistaken identity.<br />The study shows that humans in proximity <br />to the ocean's surface may look <br />like a sea lion or a seal to a shark.<br />The study shows that humans in proximity <br />to the ocean's surface may look <br />like a sea lion or a seal to a shark.<br />In particular, a human swimming<br />and paddling on a surfboard bears a striking resemblance to a shark's usual prey.<br />We found that surfers, swimmers and pinnipeds (seals and sea lions) on the surface of the ocean will look the same to a white shark looking up from below, because these sharks can’t see fine details or colors, Laura Ryan, researcher at Macquarie University, via Yahoo News.<br />White, bull and tiger sharks account for the most attacks on humans by a considerable margin.<br />White, bull and tiger sharks account for the most attacks on humans by a considerable margin.<br />The study says that shark attacks have risen in <br />the last 20 years, and surfers may be especially <br />at risk due to the time they spend in deeper waters.<br />Fear of shark attacks has led to <br />preventative measures like shark nets, <br />which disrupt natural marine life.<br />The chances of being attacked <br />by a shark are still very low.<br />Understanding why shark bites occur can help us find ways to prevent them, while keeping both humans and sharks safer. , Laura Ryan, researcher at Macquarie University, via Yahoo News .<br />Understanding why shark bites occur can help us find ways to prevent them, while keeping both humans and sharks safer. , Laura Ryan, researcher at Macquarie University, via Yahoo News