http://preposterousuniverse.com/images/1e0657-odx.jpg

Stipulated that dark matter is only interactive with gravitation - no collisional scattering or EM anything; e.g., neutralinos - and therefore Big Bang hot for lacking radiation mechanisms. How did both dark matter distributions remain spherical while passing through their distorted baryonic mass distributions of origin and each other?

Can two spherical dust balls pass through each other without collisions but with gravitation turned on (Newtonian or otherwise) and remain spherical?

Uncle Al
http://www.mazepath.com/uncleal/
(Toxic URL! Unsafe for children and most mammals)
http://www.mazepath.com/uncleal/qz3.pdf