Lowest lying gluonia of a pure gauge SU(N) theory with $N = N_d$ being the number of dark colors provides a viable, very attractive and simple idea for the dark matter. Indeed it gives a natural explanation for the only compelling evidence for dark matter we have, namely via gravitational lensing and simultaneously readily accounts for the difficulty we are experiencing in finding direct evidence for DM. It turns out that for very large N_d and light gluonia of mass [m~O(KeV)] there is also the ery interesting possibility of self-interacting and warm dark matter. Moreover, such light gluonia undergo Bose-Einstein condensation leading to gigantic dark stars of size [O($10^6$ to $10^8$)] solar masses which on collisions can give rise to gravitational waves possibly accessible to LIGO and future gravitational wave observatories. A simple selection rule for the dark gluonia relic density involving $N_d$ and m will also be discussed. Lattice simulations of such non-abelian theories would be very valuable.

Physics Beyond the Standard Model