Why Cats Always Land on Their Feet
“Falling Cats Always Land on Their Feet” lives up to evolution by natural selection and the law of gravity in terms of ironclad scientific truisms understood by the public, but it wasn’t always this way. The 19th-century French physiologist and cinema pioneer Étienne-Jules Marey was the first to film felines tipped over and record how they twisted their bodies in the air to land safely.
Marey’s short film launched a scientific debate that has continued between physicists and physiologists for over a century. The question boils down to this: if cats have nothing to push on, how can they successfully flip over in the air?
A new study published in Anatomical Save focuses on feline anatomy to provide an answer.
To find out how cats manage this acrobatics, veterinary physiologists from Yamaguchi University in Japan focused on their spines. They performed a series of “destructive failure” tests on spinal segments from five donated cat cadavers. (In other words, they twisted them until they broke.) They found that regions of the cat’s spine had varying degrees of flexibility: the thoracic spine in the upper body was incredibly flexible, while the lower lumbar spine was relatively rigid.
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In the less gruesome part of the experiment, they took a page from Marey’s book (or better, a filmography) and used high-speed cameras to film live cats reorienting themselves as they fell. First, the cats turned their heads and forelimbs toward the ground, then their lower bodies followed, allowing their four legs to align and break their fall.
“These results suggest that trunk rotation during overhead righting in cats occurs sequentially, with the anterior trunk rotating first, followed by the posterior trunk, and that their flexible thoracic spine and rigid axially twisting lumbar spine are adapted for this behavior,” the study authors wrote.
Simply put, the stiffer lumbar spine acts as a sort of stabilizer, anchoring the more fluid thoracic spine and allowing the cat’s upper body to twist in the air. Once the front half is taken care of, the rear half can follow suit.
It’s a satisfying answer to an age-old question, but is it satisfying enough to convince scientists to stop giving up on cats? Probably not.
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Main photo by Higurashi, Y., et al. The anatomical file (2026).
