  We consider two-colour QCD with two flavours of quarks as a possible theory
of composite dark matter and use lattice field theory methods to investigate
nuclear spectroscopy in the spin $J=0$ and $J=1$ multi-baryon sectors. We find
compelling evidence that $J=1$ systems with baryon number $B=2,3$ (and their
mixed meson-baryon counterparts) are bound states - the analogues of nuclei in
this theory. In addition, we estimate the $\sigma$-terms of the $J=0$ and $J=1$
single baryon states which are important for the coupling of the theory to
scalar currents that may mediate interactions with the visible sector.
