| Certain...aquatic vertebrates have a sixth sense: they can detect weak electrical fields in the water and use this information to detect prey, communicate and orient themselves. A study in the Oct. 11 issue of Nature Communications that caps more than 25 years of work finds that the vast majority of vertebrates - some 30,000 species of land animals (including humans) and a roughly equal number of ray-finned fishes - descended from a common ancestor that had a well-developed electroreceptive system. {Pictured is a shark - with her six senses.} |
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