Study sequences prehistoric DNA to solve the mystery of the authorship of some arrows from 47,000 years ago in the cold heart of Europe. Between 1932 and 1938, in the Ilsenhöhle cave, in Ranis (Germany), thousands of fossils of a multitude of animal species had been found.

Some leaf-shaped tools, possibly used for hunting, were known as the LRJ industry. These objects, found in Poland, Germany or the United Kingdom, were usually associated with the last Neanderthals.