The remains were initially given to forensic anthropologists (one of whom was James C. Chatters a forensic anthropologist for the Benton County Sheriff's Department) who studied them until it was determined that they were of a man who lived between 5,000 and 9,500 years ago. He was in his 30s or 40s, had a healed broken arm and a healed broken rib, and a 2.2-inch spear point was lodged in his hip (which did not kill him but probably was the source of recurring infection that could have ultimately killed him). http://en.wikipedia.org/wiki/Kennewick_Man
Kennewick man was a important discovery for many different reasons. I do wonder how the skelton managed to survive as long as it did. The first thing we notice is the spear point lodged in his hip. We do not know if this was an accident or an act of violence. Could he have fallen on his own spear or did he get caught in the cross fire somehow. Was there some sort of a violent death and did that have something to do with why the skelton is so well preserved and did not decompose in the river.
Sometimes it seems like a lot of the older skeltons we find died from some sort of a act of violence. It seems like skeltons from people who die from a disease tend to decompose quite a bit faster. Of course we know that there was not nearly as much disease before Adam and Eve and before people began to settle into cities. One of the first things Moses did was to show people who to get rid of the garbage and burn it.
We know a lot about Adam and Eve from the Bible, but we also know a lot about Kennewick man, from the remains that have been found and from the study of those remains. It would seem that Adam and Kennewick man lived at about the same point in time. It has been suggested that Kennewick man has Caucasian features which means his ancestors could have come from the caucasus area very close to where Adam lived.
We can learn a lot from Kennewick man and I just mention a few of the more obvious things we know.