I think that's the point, they do not experience acceleration in zero g, which is the point of testing visual/aerial cues, which DO remain in free fall (electri

I think that's the point, they do not experience acceleration in zero g, which is the point of testing visual/aerial cues, which DO remain in free fall (electric fans, horizons). I'm fairly sure you just read this backwards, thought I'd explain better. This is interesting because, it provides information on how the cat brain might function - if they have accelerometers embedded in their brains, that is quite interesting, but somewhat unlikely (birds have magnetic sensors, not impossible or unprecedented), if, perhaps more likely, they have incredibly sensitive hearing or sensation on their fur, which they interpret as acceleration, that is also interesting, in a different way.