Fragments of Meteorite

The study group of Lawrence Berkeley National Institute discovered countless fragments of meteorite which came flying to earth about 35 thounsand years ago from the fossils of the tusk of mammoth and the skull of bison excavated in Alaska and Siberia. It is said that the many falls of huge meteorite made dinosaurs wipe out. So, this is very important evidence.Because I wanted to know the reason why dinosaurs suddenly wiped out, I am satisfied to hear the news.