An article published in the journal “Current Biology” describes a research on a species of reptile called Saniwa ensidens, related to the modern monitor lizards that lived about 49 million years ago in today’s Wyoming, USA. A team of researchers studied fossils of these animals discovered almost 150 years ago, concluding that they had four eyes. The two extra eyes were connected to the pineal and parapineal glands. This is the first discovered case of jawed vertebrate with four eyes.