Recovered from a 2000-year-old shipwreck, this corroded bronze gear assembly sat in a museum drawer for decades. Now, we know it was an astonishingly complex astronomical calculator, predicting eclipses and tracking planetary movements. Who built this technological marvel, and was its knowledge lost?

We explore the cutting-edge imaging that revealed its secrets and meet the historians and engineers trying to reconstruct it. This device rewrites our understanding of ancient Greek science and poses a haunting question: what other genius was lost to time?

Hosted by Ibnul Jaif Farabi. Produced by Light Knot Studios (lightknotstudios.com).