Tangential quibble: For anything that could be called "human-style" learning, which presumably requires abstract intelligence and cultural transmission, we're probably looking at something that has existed only during the period of human behavioral modernity - commonly taken to date from roughly 40-50,000 years ago. Assuming a generation is ~20 years (and there are some arguments that the average generation might have been closer to 25 years), that's only 2500 generations.

I think it's fascinating that we have developed from un-self-reflective animals, to abstract thinkers on the verge of creating wholly new abstract-thinking entities from scratch, in only two and half thousand steps. Especially given that the majority of the technical knowledge necessary was developed only in the last 500 years, or 25 generations.