Re: It's always fascinating when they probe Uranus.
"supermarkets with high-volume traffic tend to favour the large-volume, two-winged variant (like this one) that does indeed "open and close" as it turns. Maybe the author had one of those in mind...?"
FWIW, that one in the video never opens either, at least not all the way through. It's like almost every revolving door ever, ie it works like an airlock.
Biting the hand that feeds IT
