A rather interesting report that touches on a number of TO topics, though it is not directly about evolution
https://news.mit.edu/2024/csail-ceti-explores-sperm-whale-alphabet-0507
We've discussed in the past what we should expect of a communication system to be called a language, and if non-human animals have them (e.g. how much generative grammar is needed) and also what is a code (and if DNA is one), which the paper (and the
video) also touch upon - the difficulty here to decide to that extend there is intentional messaging here, or if it is just behavioural
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