Apollo/Gemini Space Program
Technology Not all of the lost technology is from antiquity and the early part of the century, sometimes it’s a bit more recent. Case in point is the Gemini and Apollo missions. The race to get into space before the USSR meant that NASA was doing everything it could to develop rockets, modules and mechanisms to get into space. A lot of that old technology is around, but the schematics and original components are so disorganized and scattered that now current NASA staff is trying to reverse engineer the original tech. At the time, they used independent contractors worked on specific parts, and took their work and schematics with them, that no one has a holistic vision of how it all worked together.