The scientific explanation behind a cat's ability to always land on its feet is known as the righting reflex. This reflex is the result of a number of physical adaptations that cats possess, such as their flexible spine and their ability to twist their bodies in midair. Additionally, cats have a unique inner ear structure which helps them to sense their orientation in space, and they have a strong sense of balance which helps them to adjust their body position in midair. These adaptations enable cats to always land on their feet, even after falling from a great height.