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Welcome to Stuff to Blow Your Mind, a production of iHeartRadio.

Hey, welcome to Stuff to Blow Your Mind. My name is Robert Lam.

And I'm Joe McCormick and we're back to talk numbers again.

We promised you it would happen and it happened maybe sooner even than you were expecting.

So in the last episode of the show, we were talking about the human number sense and different

ideas about to what extent our sense for numbers might be partially innate, partially a cultural

invention and what the arguments and evidence on each side of that question would be.

But today we wanted to look at some of the evidence from history and archaeology about where

our earliest real direct indications of number use come from and what some solid physical evidence

of that kind of thing might be and questions on how best to interpret those things.

And it's all really fascinating stuff because it's not just I guess it's easy without

knowing much about it to think, well, okay, you're talking about just evidence of humans

in various cultures or ancient groups doing some sort of mathematics, some sort of figures.

But the more you look at it, you just see how interconnected numerals math are with technology,

...