Video: We always hear that dolphins are smart, but how smart are they actually? Lori Marino explains for Ted-Ed in this cute animation, and it's almost stunning how intelligent they are. Their encephalisation quotient (brain size to body size) is second only to us dumb humans. The video goes details how they can pass down knowledge to their kids, understand language, empathise with other creatures and so forth.
It's an interesting watch, for sure.