A new study on cut marks has pushed the date humans started throwing spears back to 90,000 years. Cut mark studies have been around a long time. I remember them back when I was an undergrad in the mid-80s. You'd think someone would've thought to do this sooner, but I guess not. At any rate, now that they know what to look for, I'll be the date gets pushed back even further as new finds come to light.