Ocean Giants
... that the BBC nature documentary series Ocean Giants includes episodes about whale songs and the cognitive abilities of dolphins?
... that the BBC <a href="./Nature_documentary" id="mwEUg" rel="mw:WikiLink" title="Nature documentary">nature documentary</a> series <i id="mwEUk"><b id="mwEUo"><a href="./Ocean_Giants" id="mwEUs" rel="mw:WikiLink" title="Ocean Giants">Ocean Giants</a></b></i> includes episodes about <a class="mw-redirect" href="./Whale_sound" id="mwEUw" rel="mw:WikiLink" title="Whale sound">whale songs</a> and the <a href="./Cetacean_intelligence" id="mwEU0" rel="mw:WikiLink" title="Cetacean intelligence">cognitive abilities of dolphins</a>?