Summary
Although glass looks solid, it's actually a very slowly flowing liquid called an "amorphous solid."
Old cathedral windows are thicker at the bottom than the top. This shows glass flowing down over centuries... or so it was thought. Actually, this is a flaw from old glass production techniques. Still, glass is truly an "amorphous solid." Since it lacks crystal structure, it's technically neither fully solid nor liquid.
How did this info make you feel?
Majority:
( reactions)
