Babies produce a brain signal that suggests they can identify faces at 4 months old, with this signal becoming more robust from 6 months d3sign/Getty Images
Babies may be able to identify people’s faces before anything else, such as cars or letters of the alphabet. Researchers have found that infants as young as 4 months old produce a distinct brain signal when they see an image of someone’s face, which could explain why some babies become scared of strangers at around this age.
Kalanit Grill-Spector at Stanford University in California and …
