When we think of old photography, we tend to imagine things being in black-and-white. However, as these images prove, this wasn’t exactly the case — a popular early photographic form was the cyanotype, in which only blue hues were transferred from film to prints. Looking at early cyanotypes now feels like stepping into another dimension, one more austere and eerie than our own. Some of these images almost seem like visions of an alternate future, or products of an alien civilization; they warp our sense of the past in ways that feel profound.