Alettie and Yvonne live in Chicago and recently went to the MSI (that's the Museum of Science and Industry) for its 75th anniversary. While they were there, they met Annette and G. Brian, glass artists from the Corning Museum of Glass. They also spoke to a stained glass artist, Erin Botti, who said that the colors in stained glass come from metals like gold and silver. Their question: How can gold look red and silver look yellow?

This video is available in both English and Spanish audio, along with corresponding closed captions.