I will illustrate this situation with an example I encountered not long ago, in which a scientific article I was reading presented me with some new and outright fascinating knowledge. The following quote, including the reference, is taken from an article published by K. Sune Larsson in the Journal of Internal Medicine:
"The myth from the 1930s that spinach is a rich source of iron was due to misleading information in the original publication: a malpositioned decimal point gave a 10-fold overestimate of iron content [Hamblin, 1981]. (Larsson, 1995: 448–449)1 "
The quote caught my attention for two reasons. First, it falsified an idea that I had carried with me since I was a child, that spinach is an excellent source of iron. The most striking thing, however, was that a single decimal point, misplaced 80 years ago, had affected not just myself and my now deceased parents, but also a large number of others in what we place on our table.
(…) For generations, parents have been wasting their time and energy, nagging their more or less anemic children to eat a vegetable that the young typically abhor, ruining family social events in the process.