Q: I just bought an antique mirror, but the reflective surface is blotchy. I know it used to be possible to have a mirror re-silvered—does anyone still do this? A: Plenty of shops advertise ...

When famed German Chemist Baron Justus von Liebig made the first modern mirror 105 years ago, he poured his new silvering solution from a laboratory beaker on a pane of glass, gave humanity the best ...

If you enjoyed this article, I’d like to ask for your support. Scientific American has served as an advocate for science and industry for 180 years, and right now may be the most critical moment in ...