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Chimps show another other chimps how to use tools. My roommate showed me some tricks to make better scrambled eggs. Group members teaching each other is called cultural transmission. And a study finds that cultural transformation transmission is behind the spread of a hunting technique among humpback whales off New England. The research is in the journal Science. It's called "lobtail" feeding: a humpback whale slaps the surface of the water with its nail tail . The resulting bubbles pen in prey fish, which the will whales gobble up. Researchers first saw lobtail feeding in 1980. Within 30 years, 37 percent of observed humpbacks had picked up the technique. To create mathematical moods models for the spread of lobtail feeding, researchers used 27 years of data from whale-watching boats in the Gulf of Maine. And the models that precluded included cultural transmission as a factor best matched the data. Those models assumed that humpback whales that spend more time with lobtail feeders were more likely to dig pick up the method themselves. Clearly, whales are capable of sophisticated social interactions - and we've only seen the tip of the tail.