Why did ancient cultures, such as the Mesopotamians, use sexagesimal (base-60)? I've been doing some reading on this, and there seems to be no consensus. Of course, it's rare that there's perfect consensus in archaeology and ancient history, but, as I see it, the answer is wildly different depending upon which author you consult.
Do we have any sense of why base-60 was chosen? It seems like such an oddly large base to choose (even if it was more of a 'fusion' of base-10 and base-60). Why not something smaller and 'countable'?