Glass
- Episode aired May 18, 2021
![History Erased (2019)](https://m.media-amazon.com/images/M/MV5BZWU2NGQ5MjYtNjgyNy00N2M1LThiNjctMDBkMjA2OWE1ZmM3XkEyXkFqcGdeQXVyMjU3ODMzMzU@._V1_QL75_UX190_CR0,2,190,281_.jpg)
Glass brought light into homes and put the world into focus; people use glass to protect ourselves, cure disease, and create artistic masterpieces.Glass brought light into homes and put the world into focus; people use glass to protect ourselves, cure disease, and create artistic masterpieces.Glass brought light into homes and put the world into focus; people use glass to protect ourselves, cure disease, and create artistic masterpieces.