Something happened about 13000 years ago that reset or give birth to civilization as we know it. This seems to be another proof of that.
>>> This evidence of ancient cave exploration and mining spans a period of many generations over about 2,000 years and dates from 12,000 to 10,000 years ago, according to the study. That was 8,000 years before the establishment of the Maya culture for which the region is well known.