In the case of the Wolf Bone, its incisions are divided into groups of five, a common boundary in many numeral systems. Cultures from around the world tend to count by marking one, two, three, four, and then striking, slashing, or hooking a line for five. Psychological studies suggest this is something close to an innate cognitive limit – a natural partition in human thought, though one that is far from impermeable.
I'm curious about cultures that don't use base ten or base 5 now
