The deadly truth about a world built for men – from stab vests to car crashes
theguardian.com
theguardian.com
So far the only comment was the shameful one by "xndgg" who at least apparently had the decency to feel ashamed enough not to want the comment linked to their usual username. And at least it was quickly [flagged][dead].
There's no real basis to assume why a man would have made that calendar, and yet, quite often that assumption is made, because women tend to be forgotten.
Apparently, the periods hypothesis is not favoured for a variety of reasons... And just because counting to 28 is more useful to women than men (men and women who tracked the moon phases for millennia don't agree) doesn't make it more likely to be periods counting.
Plus the numbers on the bone are not 28 but "are understood to indicate 9, 19, 21, 11; 19, 12, 13, 11; and 7, 5, 5, 10, 8, 4, 6, 3"...
9+19=28, here it is!
LOL that's numerology, not science...