Oldest ever piece of string was made by Neanderthals 50,000 years ago | New Scientist The string is extremely fine but can be seen under the microscopeM-H Moncel A piece of 50,000-year-old string found in a cave in France is the oldest ever discovered. It suggests that Neanderthals knew how to twist fibres together to make cords – and, if so, they might have been able to craft ropes, clothes, bags and nets.