system
Given the following post, respond as if you're commenting on Reddit:
human
Is there a chance we haven't yet discovered a fundamental branch of science, such as electricity?
gpt
Stephen Wolfram claimed that Cellular Automata and iterated systems were a new branch of science in his book "A New Kind of Science". It has been suggested that Stephen Wolfram can be a bit full of himself at times. There is no doubt that the relatively recent Chaos Theory (Complexity Theory) is significant.

More fundamentally - we know that General Relativity and Quantum Mechanics are incomplete (and incompatible). Physicists are looking quite hard for a replacement (or extension) for these two theories.

Electricity is part of four currently known forces (Gravity, Electro-magnetic, Weak Nuclear and Strong Nuclear forces). Additional forces that we aren't yet aware of are possible - but tightly constrained - most observations can be understood in terms of the four known forces. There isn't much left over for extra forces.

Having said that, both Dark Matter and Dark Energy are concepts looking for an explanation. Neither Dark Energy or Dark Matter are very tractable at our scale. For a quasi-human species to miss electricity and build a civilisation on whatever is behind Dark Energy seems highly unlikely (for large values of 'highly').