Great question! Cats like we have as pets today are related to the ones in the wild – like leopards, and lions. These kinds of cats were especially good at hunting, and were very good at going up into the trees. Because of this…they also had to be very good at going back down onto the ground!
So this is something that today’s cats that we have as pets are also good at. When they fall, they twist their body in a very precise ways. Scientists have studied this using slow-motion photography, and found out that it always happens in exactly the same way!
First they turn their head (based on the off-balance signals that their brain is sending out!), then their spine and legs. The cat arches its back a bit, which helps it hurt less when its feet hit the ground. And I think thats how it all works!