I would say that in the last 30 years, since the 1980’s, there has been a rising interest in dolphins.  We really don’t know much about them. Of course there have been some people that have taken them seriously enough to learn about them.  On the internet you can find all sorts of topics related to dolphins. “Save the dolphins” is one of them, another is “E.T.’s”; another one is “dolphin therapy”.  Today I’m going to share some information based on their innate “sound”.
Powerpoint included