The arachnids, which are not spiders, were thought to have only two eyes, compared with many more on spiders. By Veronique Greenwood Guilherme Gainett, then a biologist at the University of ...

A species of daddy longlegs has been hiding four extra eyes. While the newfound peepers never fully develop, the vestigial organs suggest that this arachnid lineage is about 50 million years older ...

While spiders can have up to eight eyes, daddy longlegs, which belong to a different order of arachnids called harvestmen, usually have just two eyes. Mathias Krumbholz via Wikimedia Commons under CC ...