The exciting discovery earlier this year of evidence for Cosmic Inflation looks to have been contaminated by the gas and dust in our own galaxy.
Sometimes theoretical discoveries are made or evidence is uncovered that refines and expands our knowledge of the universe in some fundamental way. Nothing, Absolutely…Nothing, allows that to happen like science does. Science delivers the goods as they say. These advances however are always potentially provisional. There’s always assumptions that could be wrong or unconsidered frames of reference or new powerful evidence that could change things. Of course, many of our most cherished scientific theories are supported not with just a mountain of evidence but continents of high quality evidence. Evolution is the canonical example of this. Its broad strokes are so well established that (to paraphrase Stephen J Gould) it would be fucking asinine not to proceed as if we were 100% certain.