Dark Matter Might Clump to Form Planets

A new theory suggests dark matter could coalesce into massive structures.Dark stars may not just be for Grateful Dead fans anymore.In a new paper uploaded to arXiv, Rutgers University astrophysics professor Matthew R. Buckley puts forth a truly wild hypothesis: It might be possible to build worlds out of dark matter.But the whole thing came to him from an unusual angle: He wanted to prove that dark matter structures were impossible. In a blog post, Buckley outlined his thinking.