It's been a tough year for science. The American Statistical Association just issued a statement scolding scientists for misusing statistical analysis. Scientists continued to fight over an evaluation of 100 psychological studies, most of which could not be reproduced. Critics have cast doubt on a widely believed psychological theory of human willpower.
So yes, science is fallible. Scientists are only human and science is not a synonym for truth. It's a bumpy, meandering road that heads in that general direction. That makes skepticism good, up to a point. Beyond that point lie nonsense and superstition. The Earth really is round.
So how do you tell what to believe?