Archaeologists Found Vitrified Sand Inside a Sealed Chamber

Archaeologists open a sealed chamber—and find sand that’s been vitrified (partly melted into glass). What kind of heat does that take, and how could it happen underground? Lightning, fire, industrial-style kilns, chemical reactions, or something rarer? We break down the most realistic explanations and what evidence would confirm them. #Vitrified #Sand #Chamber #Archaeology #Mystery