The article title might seem to suggest we have evidence that cavemen were could throw further than our best Olympic athletes... Instead, the article content is bemoaning that we have a standardized javelin that isn't as far-throwing as can be. Thus, the world record javelin toss may never be beaten.

Yes, the permanent world record is a little unfortunate. But it has nothing to do with how cavemen would throw.

Standards must be made to judge fair competition among participants. Yes, they're a little bit arbitrary - the 100M dash could very well be a 106M dash. But that wouldn't make the athletes 6% more impressive. Likewise, we could improve our javelins every year to get further and further throws. But our global interest isn't on the throw, but the thrower.