Matteo Cantiello edited Enter PLANCK.tex  over 9 years ago

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In a new \href{http://arxiv.org/abs/1409.5738}{paper}, the collaboration behind the european satellite \href{http://www.esa.int/Our_Activities/Space_Science/Planck}{Planck} reported that the amount of foreground dust present in the line of sight of BICEP2 instruments is enough to explain the observed signal, previously attributed to cosmological inflation. While it could still be that a significant  part of the observed  polarization signal is coming from inflation, it would require two very different, unrelated phenomena to contribute at a very similar level. Which is unlikely. The absence of evidence is not evidence of absence, but any extraordinary claims about the very first instants of the universe will have to be backed by extraordinary proof.