There are SEVEN simple machines now!!!
We all know the six simple machines as defined in the classical era. I just discovered the existence of a seventh. I was trying to repair my trash can with mechanical top and foot lever. What I found was amazing: the hinge broke because it was a thinned out piece of plastic attached to two struts. That is, the plastic was thinned out at the middle so it could bend. That's it. It acts as a hinge. Bending thin plastic is how I used to intentionally break pieces of model kits off the sprues. I can do nothing but salute the inventors of this new machine, the Seventh Simple, designed to work until it breaks!! Awe!