[Dysart]

Great find. Article mentions that it's difficult to speculate on the causes for the longevity jump, but my money is on a great advancement in communication. Yea, they already had a primitive language, but I propose that this was the time when it became more structured. No matter what other innovations were put forth at this time, without the ability to communicate these ideas, they would have been limited in scope.

[balrog666]

Anthropology ping!

[dread78645]

... but my money is on a great advancement in communication.

Agree. Probably the start of story-telling or the narrative how-to-survive because this is how grand-pa did it.