> On the other hand, given what we know now, "a diffuse cloud made of particles that do not interact with light" is a totally reasonable hypothesis. Was a reas

> On the other hand, given what we know now, "a diffuse cloud made of particles that do not interact with light" is a totally reasonable hypothesis. Was a reasonable hypothesis. Given the evidence so far, it's now very debatable. Just like another planet was a reasonable initial hypothesis until it wasn't.