I have an elbow that bends the wrong way, and I'd do things like stand in an elevator and the doors would close, and I'd pretend that my arm had got caught in it, and then I'd scream, 'Ow, ow, put it back!'
“As neither of these two great research scientists was able to find the solution to the mystery, it is small wonder that none of their contemporaries were able to do so either.”
“However, further research has shown that it is the normal condition for humans and for most other mammals. It seems pretty clear why this is the case for most mammals and for most human beings.”