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Research on a 290-million-year-old fossil of the Acanthodes bronni, a primitive shark, has revealed that this extinct species may be the last common ancestor of all jawed vertebrates, including mankind. 
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They have a reputation for being ruthless, solitary predators, but the opposite may be closer to the truth. Some sharks organize themselves into communities and subcommunities, forming long-term relationships with other sharks.
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A professor at Vassar College, Dr. Long and his team study real live sharks and their vertebral columns. They then takes these findings and design computer models and artificial vertebral columns to understand sharks' movement and biomechanics. Articles about ROBOTICS: http://www.scoop.it/t/science-news?tag=robotics
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A new species of walking epaulette sharks (Hemiscyillum freycineti) has been discovered off the coast of Indonesia. These sharks actually walk using their pectoral fins.
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