How a particle accelerator helped recover tarnished 19th century images
The technique could aid restoration efforts
![before and after daguerreotypes](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2018/07/062718_kb_daguerrotype_feat.jpg?fit=860%2C460&ssl=1)
BIG REVEAL To the naked eye, the woman in the damaged daguerreotype (left) looks ghostly. A synchrotron helped researchers restore her portrait (right).
Left: National Gallery of Canada; Right: M.S. Kozachuk et al/Scientific Reports 2018