  Hexaquarks constitute a natural extension of complex quark systems like also
tetra- and pentaquarks do. To this end the current status of $d^*(2380)$ in
both experiment and theory is shortly reviewed. Recent high-precision
measurements in the nucleon-nucleon channel and analyses thereof have
established $d^*(2380)$ as an indisputable resonance in the long-sought
dibaryon channel. Important features of this $I(J^P) = 0(3^+)$ state are its
narrow width and its deep binding relative to the $\Delta(1232)\Delta(1232)$
threshold. Its decay branchings favor theoretical calculations predicting a
compact hexaquark nature of this state. We review the current status of
experimental and theoretical studies on $d^*(2380)$ as well as new physics
aspects it may bring in the future. In addition, we review the situation at the
$\Delta(1232) N$ and $N^*(1440)N$ thresholds, where evidence for a number of
resonances of presumably molecular nature have been found -- similar to the
situation in charmed and beauty sectors. Finally we briefly discuss the
situation of dibaryon searches in the flavored quark sectors.
