[Harmless Teddy Bear]

Unique arm morphology in Neandertals was likely caused by scraping activities such as hide preparation, not spear thrusting as previously theorized,

So something that is done for hours a day tends to develop you more then something that you do for, at best, a minute a day?

Gee, who would have thought!

[SunkenCiv]

Heh... probably the analogue that comes to mind is that of jousting knights of the Middle Ages. Bigger right arm bones etc.