The discovery of a near 10,000-year-old lunar calendar in Scotland has archaeologists scrambling to rethink the beginnings of history. The implications are huge, too. It turns out that the men of the Stone Age weren’t as primitive as we’d previously thought.

The calendar itself is primitive to be sure. However, it’s also the oldest calendar ever discovered predating the bronze calendar in Mesopotamia that had held that title until now by several millenia.

See the full article: Archaeologists Discover World’s Oldest Calendar in Scotland | Gizmodo.