Shimmering soap bubbles have a dark side
Dark spots in soap film grow and merge moments before bubble pops
![soap bubble film](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2017/01/012117_scivis_mainREV.jpg?fit=860%2C460&ssl=1)
HELLO DARKNESS Just before a soap bubble bursts, its rainbow surface becomes peppered with dark spots in the thinnest regions of the bubble film. Once the darkness spreads over a large area, the bubble pops.
L. Shen