The filters have become enormously popular. Every few months, a new face-symmetry-focused trend seems to take hold on TikTok, set to audio from music (like Olivia Rodrigo’s “Deja Vu”) or movies.

Science would have you believe that the world's most beautiful people have perfectly symmetrical faces - but these pictures might make you disagree. emma gritt; Published: 19:51, 6 Sep 2017; ...

Dag Knudsen spends a lot of time photographing symmetrical faces. Usually they belong to beautiful people in fashion magazines. But increasingly, his models are llamas. Lizards. Even snails. It ...