Which of these was invented in East Germany?

Yet mobile screens still break....? Surely if there was a screen that wouldn't break, all mobile phones would have them...or maybe some makers want to keep selling screens and we have to pay to replace...?

Silent fireworks, that would be a dream. About time it happened, nearly all pets and wild animals, and some people near to humanity would have a far better quality of life if it was so.

Kiwozzie, read up planned obsolescence. We live in a capitalist world.

So, what's the difference between Superfest unbreakable glass and Bullet-proof glass?

Kiwozzie, or maybe to keep the cost reasonable, and weight, the compromise is... what we have now, just a thought.

Lionessa, And now they have invisibility cloaks! I don’t lie! Watch YouTube. They have a section about China and these “invisibility cloaks”. Watch it, it’s pretty amazing stuff.

jojo, Thanks for pointing out my error without providing clarification. M.C. Escher was fascinated by the Penrose Stair illusion, and used it in several of his drawings. The Rochester Institute of Technology has built an optical illusion using mirrors and secret passages that appears to be a real set of Penrose stairs.

Don't use the phrase "unbreakable glass" when it really isn't. I didn't choose that answer because nothing is "unbreakable."

Is Pyrex oven dishes made of this then, and insulated windows?

Stare at that image for a while. Yikes!