  Recent experiments on magic-angle twisted bilayer graphene have discovered
correlated insulating behavior and superconductivity at a fractional filling of
an isolated narrow band. In this paper we show that magic-angle bilayer
graphene exhibits another hallmark of strongly correlated systems --- a broad
regime of $T-$linear resistivity above a small, density dependent, crossover
temperature--- for a range of fillings near the correlated insulator. We also
extract a transport "scattering rate", which satisfies a near Planckian form
that is universally related to the ratio of $(k_BT/\hbar)$. Our results
establish magic-angle bilayer graphene as a highly tunable platform to
investigate strange metal behavior, which could shed light on this mysterious
ubiquitous phase of correlated matter.
