But it is one thing to be aware of the annual astronomical cycle and another to discover the mechanisms of life. We don't know for sure what, but something happened about 40,000 years ago in what is now Europe.

Despite the bewilderment caused the almost continuous bombardment of news about the discovery of a new fossil that revolutionizes everything we knew until now about human evolution, at the beginning of the twenty-first century, there is a broad consensus regarding certain key moments in our evolution.