This strange formation in a shallow saltwater puddle along Hawaiʻi’s reef looks almost like a UFO left its stamp behind. The circular shape, dark fractured lines, and green center create an uncanny pattern resembling an impression burned or pressed into the reef. A narrow trail extending away from it makes the formation even more mysterious—almost as if something touched down, left its mark, and disappeared. Of course, it’s a natural formation shaped by trapped seawater, algae, sediment, evaporation, and the texture of the reef. But photographed from directly above, nature turns something only inches across into what looks like evidence from another world. The answers reside in the Image