/sci/ - Science & Math

>>14741998
>what is the evolutionary reason?
The natural process of evolution does not have goals so there is no such thing as an "evolutionary reason." That's like asking what's the "erosional reason" a natural rock arch forms, which is gibberish. The only response is "erosion" itself and then you go on to explain how erosion works because the person who asked that is an idiot who implies the natural process of erosion has goals.
The benefit for this muscle is that it allows for greater dexterity for motor tasks, such as tying an arrowhead to a stick, or more efficiently scooping out food such as bugs from small spaces or fleshy parts of fruit. Tiny primates could greatly benefit from this more-efficient dexterity when they reach into a tiny hole to grab bugs.