A mammoth tusk boomerang discovered in Poland is approximately 42,000 years old, potentially making it the oldest known boomerang in the world and challenging previous understandings of early human technological advancement,

Boomerangs are some of humanity’s oldest tools. In the northernmost region of Australia, 50,000-year-old cave art appears to depict Indigenous hunters throwing the weapons at prey, including kangaroos.

(CN) — A boomerang made from a mammoth’s tusk pulled from a Polish cave could be one of the oldest known examples of a complex tool found in Europe, according to a research study published in PLOS One on Wednesday.