1.1 Africa - Notches and stars

Notches and stars: How Africa invented the languages of calculation Forty-three thousand years ago, a human hand carved twenty-nine notches on a baboon bone in a cave in southern Africa. Twenty-nine marks—the exact length of a lunar cycle. The Lebombo bone is the oldest evidence of numerical thinking ever discovered. And it may have been created by a woman, tracking the phases of the moon in relation to her own body.In this episode, we go back to the forgotten origins of calculation. You'll discover the Ishango bone, carved twenty thousand years ago on the shores of Lake Edward, which may contain the first prime numbers in history — long before the Greeks formalized them. And Nabta Playa, that circle of standing stones in the Nubian desert, aligned with Sirius and Orion's Belt—the oldest astronomical observatory ever built, two thousand years before Stonehenge. But the most disturbing discovery comes from the Yoruba's Ifá system. Practiced for at least 2,500 years in Nigeria, this divination system uses 256 configurations obtained by binary combinations. Eight marks. Two possible states: open or closed. One or zero. Two to the power of eight equals 256. We are dealing with eight-bit coding — structurally identical to the code of the first IBM computers. The babalawo, the Ifá priest, does not guess at random. He calculates. Ethnomathematician Ron Eglash recognized it as “a pseudo-random number generator” and “a digital feedback loop.” Leibniz himself, who formalized binary in the West in the 18th century, was familiar with this system. He admired the “profound philosophical binary logic” he perceived in it. Africa also invented fractals—the geometry in which the same pattern repeats itself at different scales. Villages are organized in circles within circles. Hairstyles, textiles, and sculptures that use recursion. Sahelian windbreaks that optimize materials according to algorithms before the term even existed. And then there is memory. Babalawos memorize a corpus of several million verses. Griots recite genealogies spanning forty generations. This human memory, honed by decades of training, has survived invasions, migrations, centuries of upheaval—without electricity, without servers, without updates. Our artificial intelligence is trained on billions of texts. But it remains fragile, dependent on infrastructure. African memory systems have been functioning for millennia. Before silicon, there was bone. Before computer code, there was Ifá code. Binary is not a Western invention. It is an African heritage.