Ancient Civilizations17 Out-of-Place Artifacts Said to Suggest High-Tech Prehistoric Civilizations Existed Posted on May 11, 2025 by Administrator According to the conventional view of history, humans have only walked the Earth in our present form for some 200,000 years. Advanced civilizations appeared several thousand years ago, but much of the mechanical ingenuity we know in modern times began to develop only around the Industrial Revolution a couple hundred years ago.
