  We explore the physics of novel fermion liquids emerging from conducting
networks, where 1D metallic wires form a periodic 2D superstructure. Such
structure naturally appears in marginally-twisted bilayer graphenes, moire
transition metal dichalcogenides, and also in some charge-density wave
materials. For these network systems, we theoretically show that a remarkably
wide variety of new non-Fermi liquids emerge and that these non-Fermi liquids
can be classified by the characteristics of the junctions in networks. Using
this, we calculate the electric conductivity of the non-Fermi liquids as a
function of temperature, which show markedly different scaling behaviors than a
regular 2D Fermi liquid.
