![Skeptoid show](https://d3dthqtvwic6y7.cloudfront.net/podcast-covers/000/026/981/small/skeptoid-critical-analysis-of-pop-phenomena.jpg)
Summary: About sixty prehistoric stone forts in Scotland have vitrified walls, where the stone was melted into glass. Some say this was impossible with the technology of the day.
Summary: About sixty prehistoric stone forts in Scotland have vitrified walls, where the stone was melted into glass. Some say this was impossible with the technology of the day.