This article was originally published on Common Edge.

In Childhood’s End, Arthur C. Clarke’s mid-20th century science fiction classic, a character wonders if the flattened inhabitants experiencing a far-off planet’s tremendous gravitational force are aware of the third dimension. In recent years, this hypothetical has found parallels in our growing digital universe, where we are continually drawn to our flat screens to confirm our relevance, connect with like-minded individuals, or create dating profiles. With attention spans riveted by endless digital content, walking down the street has become a delicate dance of avoiding people staring obliviously at their phones—those who, calling to mind Ada Louise Huxtable’s famous question, “Kicked a Building Lately?,” might walk right into one.