Lateralized sleeping positions in domestic cats

After analysing 408 YouTube videos, researchers have found that cats show a tendency to sleep on their left side with 65% choosing this "leftward sleeping position".

This finding is not only interesting from the perspective that cats show a significant population-level bias for the left side but also fits very well with previous findings on functional specialization in the mammalian right hemisphere. The right hemisphere is dominant for threat processing, and in most species, animals react faster when a predator is approaching from the left side.