Humans tend to prefer dogs with darker eyes, scientists have found, which could be linked to how they evolved from wolves. Dogs evolved from their closest relatives, gray wolves.

A dog with “soulful eyes” waited for a home — then she caught the attention of a family living in another ... and wanted to meet her,” Orange County Animal Services wrote Feb. 15 on Facebook.

Dogs with dark eyes scored higher for friendly and nonthreatening traits like kindness, sociability, and trustworthiness, while pale-eyed dogs were more likely to be labeled aggressive and mature.