Babies’ cuteness is key to their survival. What happens when they’re not that cute?

Babies' cuteness is a powerful force to be reckoned with. It melts adult hearts, ensuring babies a steady source of food and protection until they mature to an age when they're slightly less vulnerable.

What is it about babies that makes them so cute? It's their eyes, which are huge relative to their faces (eyeballs don't grow all that much after birth); their heads, which are too big for their bodies; their cheeks; and their tiny chins that get adults to fixate on them.

Scientists say these traits activate an instinctual attention in adults. Brain scan studies have found evidence of an immediate reaction to babies in parents and non-parents alike in the orbitofrontal cortex, a region of the brain thought to be involved in rewarding and decision-making. Cute babies are just extremely hard to ignore, and this is likely hardwired into our brains.

Top: This is your brain on cute babies.

How we react to less attractive babies

There's some evidence to suggest that less cute children are treated differently. A review of the scientific literature in the journal Trends in Cognitive Sciences highlights a few conclusions that point in this direction.

A 2011 study in PLOS found both men and women would stare longer at a "cuter" infant's face. "This is in line with previous studies showing that ‘cuter’ infants are rated as more friendly, cheerful, and likeable," the authors of that paper wrote.
Take a look at these two babies. Does one pull at your heart more than the other? The one on the left has been digitally altered to look cuter.

There's more to cuteness than the face

There's some hope for babies who are less attractive than their peers. The authors of the review in Trends in Cognitive Sciences make the case that there other, nonfacial, components to cuteness: "sight, sound, or smell of infants can help facilitate caregiving and perhaps promote other sophisticated emotional behaviors," they write. (Also all parents have a bias to see the cuteness in their own children.)

What's also true is this: No baby can stay cute forever. "Both adults and children pay more attention to infants' faces than to older children's faces," the authors write, "suggesting the power of cuteness in young children's faces fades as children mature."

And however unsightly a child might be, it's unlikely that one would be so hideous as to provoke reactions like Elaine Benes and Jerry Seinfeld's here:

Why babies in medieval paintings look like ugly old men

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