In a past study, researchers found a similar facial pattern in chimpanzees, with males having relatively shorter and broader faces compared with females, controlling for body size.
Men with "mini mugs" might have been most attractive to the opposite sex and thus most likely to attract mates for reproduction, passing along the striking features to the next generation and so forth, said lead study author Eleanor Weston, a paleontologist at the Natural History Museum in London.
When the photo is uploaded, the company uses facial recognition software and an algorithm to identify partners that share similar features.
There are 67 points used to make the match — including the shape of a person’s face, distance between eyes, fullness of lips and hairlines.
"The evolution of facial appearance is central to understanding what makes men and women attractive to each other," Weston said.