Just about every animal needs water. Yet each creature's search for it is unique. Dave Matthews hosts a Hello World! Episode “Save Me” and follows the stories of three very different species -- rhinos, spadefoot toads, and manatees -- as they search for the fresh water on which all life on Earth depends. Dave Matthews’ episode of “Save Me” will air on Saturday, July 23 at 8:30ET/7:30CT. Click here to watch “Save Me” now. Visit Discovery Channel for more information.