content: Agreed and I'd wager it was much earlier than 40k, more like millions given that primates today use tools.  Most objects were made of biodegradable materials (wood, leather, bone etc..) so the evidence is lost but making a hole in an object certainly goes as far back as any human precursor's basic tool use. Homo habilis used flint (and other stone) tools 2.6 million years ago, but given that chimps today use wooden tools regularly it is presumed that human precursors have been using wooden tools at the very least since divergence some 4 million years ago.