 | Researchers have unearthed fossils of an extinct spider family that contain reflective materials once contained inside the arachnids' eyes. When a light is shined upon the fossils, the eyes of the fossilized spiders still shimmer. Structures like these can be found in many creatures alive today, typically among nocturnal predators like cats and dogs, but also among bovine and deep sea fish. |  |
 | The fossils were unearthed from an area of Korean shale known as the Jinju Formation, and are dated from between 110 and 113 million years ago. The extinct family of spiders were clearly common in the Cretaceous. |  |
