Why is glass considered a super cooled liquid?

Explanation

Glass is an amorphous solid. The internal structure of an amorphous solid is very similar to that of liquids. As a result, amorphous solids show many characteristics of liquids. Like liquids, amorphous solids also show flow property though the flow of an amorphous solid occurs very slowly. This is why an amorphous solid is regarded as a super cooled liquid. The glass panels of century old buildings are often found to be slightly thicker at the lower parts than at the upper parts. This occurs due to slow flowing of glass under the influence of gravity.