Awesome, rare footage from the National Archives showing a Pennsylvania coal mine at work in 1916... #coal #pennsylvania #history | Travis Chumley

Ancient artifacts have occasionally been discovered in extremely old coal mines, which has raised fascinating questions about the true age of these objects. Coal forms from plant material that was buried and subjected to heat and pressure over millions of years, typically during the Carboniferous period around 300 million years ago. Yet, there have been rare cases where man-made items, such as tools, figurines, or metallic objects, have been found embedded deep within coal deposits, seemingly ou

De La Fuente Lab Nature BME