Human laughter as we know it likely developed between ten and 16 million years ago. For context, the stone tools our distant human ancestors made in the Early Stone Age date back around 2.6 million years. These are vast time spans, but it was perhaps good that our Paleolithic ancestors had a sense of humor ready to deal with tech fails such as a blunt hammerstone.Human laughter as we know it likely developed between ten and 16 million years ago. For context, the stone tools our distant human ancestors made in the Early Stone Age date back around 2.6 million years. These are vast time spans, but it was perhaps good that our Paleolithic ancestors had a sense of humor ready to deal with tech fails such as a blunt hammerstone.Business[#item_full_content]