According to an article from PetaPixel, a YouTuber Mathieu Stern found a 'time capsule' in the basement of his family's old home. The box contained two glass plate negatives dating to about 1900. Being a skilled photographer he was able to develop them using an old photographic printing method called the Cyanotype.
The photos that follow are pretty sweet. What cute kitties! Click on the above link for more info on how he did it.
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