Science progressed, but it didn't bring the kinds of physical innovations we expected. At least, not until recently. Where are the flying cars? Why haven't we cured ageing? Why don't we have a base on the Moon? Why isn't energy effectively unlimited and free? We had an explosion in information sciences. The internet is a marvel. iPhones and chip technology are incredible. AI is unbelievable to witness. But why did we slow down so much on physical scientific innovation?