Science: A new way to reason.

When we first started experimenting our science was primitive but very important to growing our brains. Throwing rocks, cooking food, or maybe just fermenting it, building, group hunts, fire control, group story telling, dyadic grooming, etc. all primitive science projects helped, or propelled our brains to grow and add fun new parts!

I don't think we understood the scientific method then, language being so primitive. I do think we experimented and made choices based on our observations. The science we conducted was more evolutionary than replicable until we developed memes to transmit the observations and techniques to one another. So once we learned, and taught each other to make fire we'd created a fire making meme. I think this is the essence of science and an incredibly sweet gift from our distant ancestors. 

(Any guesses on how long ago this period was in our development?) I'd love to hear you ideas on this.