One of the greatest misconceptions many people have is that essentially all credible, credentialed, experienced scientists agree on the major tenets of their respective fields. This is simply not true. Many things that are commonly presented to the general public as established scientific facts are in reality just theories that are not fully supported by all of the known facts, and are not agreed upon by all credible scientists...only by those who are pushing the established agenda.
Brian64, I have quite a few problems with what you posted.
First, you imply that "mainstream" scientists are somehow in cahoots to push some kind of agenda. While there may be some funding mechanisms that encourage certain results, a scientist gets very little reward for confirming the results of other scientists; a well conducted study that explodes a well-accepted view is much more likely to attract fame, further research dollars and a flurry of research by others.
Second, you don't seem to understand what a scientific theory is, based on your phrase "just a theory". Scientific theories are not simply conjecture or wild-ass guesses; they are testable, reliable and well established explanations of some aspect of nature that is supported by a vast array of evidence. For example, the atomic theory of matter and germ theory are not just "possible explanations" of nature, they are much much more than that.
Third, scientists are often not the best communicators. Their work is oftentimes highly technical in nature and difficult to understand. Non-specialists gain their knowledge not from the original scientific article, but from a newspaper article, TV news bite, or Internet article. These are all written by members of the Media, which simplifies, condenses, and sensationalizes scientific papers for the purpose of selling magazines, newspapers, etc. So if a medical researcher investigating a cancer drug has some success in mediating a water channel molecule in t-cells, and concludes that more studies need to be done but not to extrapolate from in vitro to in vivo, the newspaper headline will read "Cure For Cancer Found!". Or "Oatbran Lowers Cholesterol!". The media often oversimplifies or exaggerates the study, or twists the scientist's words for their own purposes. Don't blame the scientist: blame the messenger.
I'm not a cosmologist, and am not really interested in it, but my recollection is that in the last 30 years scientists have vacillated from "the universe is static" to "the universe is expanding but slowing down" to "the universe is accelerating in growth". I could be wrong, but I don't think there is an "established agenda" that is being "pushed" by scientists in this field.