Soap film hits the big time at this exhibit, featuring a giant square soap bubble the size of a picture window. The cascading colors you see here arise from overlapping light waves that reflect from the front and back surfaces of the soap film—a phenomenon called interference.
Ordinarily, water freezes too slowly to be appreciated. Here, polarized light and an ultra cold slab let you watch water crystalize rapidly in real time. The colorful mosaic of ice that forms is different every time.