As we all know, there are three fundamental passive circuit elements in electronics (Resistor, Capacitor, Inductor). Apparently, I just discovered that there are actually FOUR.
The fourth passive element is the Memristor. Its like a very small tube for current, where when current flows in one direction, the resistance of the Memristor increases and when current flows through in the opposite direction, the resistance decreases. Another feature of it is when the current stops, it retains its last resistance value.
I don't want to steal someone else's credit so for more information go here:
http://www.memristor.org
