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Scientists in Denmark have found that some cetaceans appear to have echolocation skills that exceed those of even bats. The researchers discovered that the porpoises they studied had the ability to focus their sounds, a combination of clicks and buzzes, to more clearly define where prey fish were located. The journal eLife has the paper: http://elifesciences.org/content/early/2015/03/20/eLife.05651

The BBC has approachable coverage, with video and photos: http://www.bbc.com/news/science-environment-32043822