New research has found that cats do not rotate as a single unit, but have two main movements that allow them to always land on their feet.
For more than a century, scientists have been fascinated by a seemingly simple but intriguing question: how do cats can land on their feet with such precision every time they fall? Although physics has already explained that cats can reorient themselves in the air without violating the law of conservation of angular momentum, the anatomical mechanics behind this acrobatic feat have gone largely unexplored — until now.
A new published in the magazine The Anatomical Record discovered that the secret is in unique structure and flexibility of the cat’s spinal column.
The team examined five donated cat cadavers, carefully isolating the spinal columns with intact ligaments and intervertebral discs. The scientists divided each column into two regions: the thoracic (anterior half) and lumbar (posterior half) vertebrae, and then measured torque, stiffness, angle of rotation, and neutral zones using a torsion device.
The results were surprising. The thoracic spine presented high flexibility, with a neutral zone of approximately 47 degrees and a stiffness approximately one third lower than that of the lumbar spine. In contrast, the lower back was found to be much stiffer, with virtually no neutral zone, demonstrating that the anterior and posterior halves of a cat’s spinal column are mechanically optimized for different functions.
Higurashi et al., Anat. Rec., 2026
Sequence of a cat spinning in the air to land on its feet
To see how this translates into real movements, researchers filmed two cats falling from a height of approximately one meter on soft pillows, using high-speed cameras. The images revealed that the cats do not rotate as a single unit. Instead, the thoracic (anterior) region rotates first, followed by the lumbar (posterior) region about 70 to 95 milliseconds later. The team suggests that this sequential rotation is facilitated by the lower mass and greater flexibility of the anterior half, allowing the cat to reorient itself in the air efficiently before landing, explains the .
In addition to explaining feline aerial agility, this spinal specialization may support other movementssuch as galloping or rapid changes of direction, in which independent spinal segments improve agility.
The researchers acknowledge the limitations of the study, including the fact that cutting into the cadavers’ rib cages may slightly alter the mechanical properties. However, their findings are in line with previous studies in live anesthetized cats.
This study adds a new layer to understanding the “falling cat problem,” highlighting not just the physics but also the remarkable anatomical adaptations of our feline friends.
