Changes to Schism/Stonehenge

• 2022-01-23 16:57:24 UTC (Hans Georg Schaathun): More notes
• 2022-01-23 12:02:22 UTC (Hans Georg Schaathun): Added another historical fact.
• 2022-01-15 12:22:29 UTC (Hans Georg Schaathun): Cleaning up
• 2022-01-15 12:05:23 UTC (Hans Georg Schaathun): Added geographical structure and overview