Whales, songs and cerebrum
The largest creatures on the planet also have some good-sized brains. Why? What do they do with such large brains and how did they get them in the first place?
Here’s a video about the evolution of whales.
Here are a couple of articles about the ichthyosaurs, reptiles that returned to the ocean like the ancestor of the whales did for mammals.
Here’s a bit about whale songs.
And here’s a short sample of whale song.
Here’s a talk about dolphin language.