Remember that evidence of the early gravitational waves formed by the Big Bang? Apparently, it's not as surefire as scientists once thought. The newly peer-reviewed findings note that there's "unquantifiable uncertainty" in the source data; cosmic dust in the astronomers' map of the universe may have skewed the results. More recent mapping efforts also suggest that there might have been a false signal.This isn't to say that the earlier conclusion was flat-out wrong. It's still possible that researchers proved the existence of post-Big Bang ripples, bringing gravitational waves into the classical physics model. However, it does mean that the would-be discoverers will have to cross-check their info with experiments at other telescopes before they can brim with confidence. For now, at least, our understanding of space hasn't quite been turned on its ear.