A Gulf of Mexico fisherman opened the uterus of an adult bull shark and found a two-headed shark pup inside. According to Michigan State University researchers, this is the first two-headed bull shark confirmed by scientists. “”Given the timing of the shark’s discovery with the Deepwater Horizon oil spill, I could see how some people may want to jump to conclusions,” Michael Wagner, MSU assistant professor of fisheries and wildlife, wrote in a report in the Journal of Fish Biology. “Making that leap is unwarranted. We simply have no evidence to support that cause or any other.” (EurekAlert!)