Black holes collapse on themselves, with a such a density that they change the path of light with no light escaping them.  In coming days, the Global Warming disinformation organization, the Heartland Institute ("the leading propaganda mill sowing confusion about climate science"), will convene a Global Warming skeptic/delayer/denier coven with the 2008 International Conference on Climate Change.  RealClimate asked a great question:

What if you held a conference, and no (real) scientists came?

For anyone concerned about a polite (an overly polite) shredding of a front organization's event, take the time to read it.  

Is Dennis Avery a legitimate skeptic, or a corporate shill? Well, considering these press releases always specifically target Al Gore and not address the facts he presents that represent an entire scientific community, one can only surmise that it is the latter and not the former.