Jump to content
Join the Unexplained Mysteries community today! It's free and setting up an account only takes a moment.
- Sign In or Create Account -

Is glass a liquid or a solid?

Still Waters

Recommended Posts

There's something strange about the stained-glass windows of medieval buildings: They tend to be thicker at the bottom than at the top. Many believe this is because glass is actually a liquid that has flowed down the pane over the centuries. In contrast, others argue that glass does not flow, because it's a solid — or maybe an amorphous solid or a supercooled liquid.

So what is glass, really — a solid or a liquid, or something in between?


  • Like 4
  • Thanks 1
Link to comment
Share on other sites


There is a myth that gravity has affected medieval glass windows. Bill Bryson mentions this in later editions of his Short History of Everything- he added a note to say he had originally been misinformed. I think the truth is more prosaic- medieval glass was made imprecisely by hand, and the thicker heavier pieces were used at the bottom of the windows: The ‘glass is a liquid’ myth has finally been destroyed (gizmodo.com)

  • Like 2
Link to comment
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
  • Recently Browsing   0 members

    • No registered users viewing this page.