Ancient mammoth-tusk boomerang is twice as old as we thought
[ad_1] An artefact made from a mammoth tusk is the oldest known boomerang Talamo et al., 2025, PLOS One, CC-BY 4.0 The world’s oldest known boomerang may be 22,000 years older than previously thought, suggesting it was crafted during a period when early humans displayed an increase in artistry. In 1985, archaeologists unearthed a 72-centimetre-long ivory boomerang buried beneath six layers of sediment in Obłazowa cave in Poland. Later sediment sieving revealed a Homo sapiens thumb bone nearby, as well as antler tools, a bone bead and pendants made from fox teeth. In the 1990s, radiocarbon dating suggested the thumb was 31,000 years old – but surprisingly, the boomerang was dated to just 18,000 years old, several millennia younger than the artefacts in higher layers. Sahra Talamo at the University of Bologna in Italy suspected contamination. “Even a trace amount of modern carbon – from glue or conservation products – can throw off the radiocarbon date by tens of thousands of years,” she says. Analyses of the thumb’s carbon-nitrogen ratios showed signs that the collagen …