Were Spear-Thrower Tools Ancient Biomimetics?

When watching movies where indigenous people were attacking, hunting, or driving off enemies, I noticed something resembling a long trough used to launch a dart, arrow, or spear. Seemed silly to me, just throw the spear. I was dreadfully wrong on that. Although it looked awkward, the tool became an extension of the arm and gave more power to the projectile. This made it possible for womenfolk and young'uns to get into the act. When you had a group of people on the prod who were skilled in using those tools, you'd better get out of Dodge mighty quick-like! Credit: Wikimedia Commons / Richard Keatinge ( CC BY-SA 3.0 ) I was uncomfortable using a photo where people could be recognized, so I blurred the facts even though the original image does not do this. There are several names and styles, and simple enough that you can make your own atlatl . Interesting that these spear-throwing devices are very similar, and can be found in 'Straya and the Americas, among other pla...