Alexandra Bruce – Graham Hancock says that enough studies have been done at this point for him to conclude that a series of cometary impacts that occurred between 11,600-12,800 years ago were the cause of a mass extinction event. In the work of Hancock and others, including Dr. Victor Clube, retired Dean of the Astrophysics Department at Oxford and former astronomer at the Royal Observatory, as well as Dr. Richard Firestone of the Lawrence Berkeley National Laboratory, in California.
https://youtu.be/51yj7n5pyMg
These and others believe that the collapse of several Bronze Age civilizations in the Fertile Crescent was caused by meteoric impacts from the breakup of a larger body that is today known as Comet Encke and its accompanying Taurid complex, a stream of matter that is the largest in the inner Solar System.