This guide from Johns Hopkins University includes more detail on how to identify misinformation and how to track down authority and currency of a website.
On this blog two scientists track retractions of journal articles and report on instances of scientific misconduct. They also maintain a database of retractions.
FactCheck.org’s SciCheck feature focuses exclusively on false and misleading scientific claims that are made by partisans to influence public policy.
For more information about evaluating sources of information, check out these related guides.
