Papua New Guinea’s stone pestle is about 8,000 years old.

Evidence

We think it’s about 8,000 years old, and a pestle then would have been used exactly as it is now – to grind food in a mortar and break it down, so that it can be made edible. — Neil MacGregor, A History of the World in 100 Objects, 133

Categorization

• corroborated: 2 independent passages support this claim — Neil MacGregor, A History of the World in 100 Objects, 133