This is an interesting development for science that involves glass. You know the problem of how it is transparent, imagine if it just wasn't. Now, there is turnable glass that uses nanocrystals and metallic nanostructures, but it is pretty costly. That could change as Professor David Clarke and Samuel Shian at Harvard John A. Paulson School of Engineering and Applied … [Read more...] about Glass Turns from Opaque to Clear in a Second