Skeptics is already a pretty old site (by Internet standards), there are questions here that are over 10 years old. Science advances all the time and new research is conducted which can lead to changes in the currently prevailing opinions.
In light of this, is it OK to re-ask an old question? Technically it's a duplicate, but the answers today may very well be radically different than those 10 years ago. If yes, what would be the cutoff age before re-asking an old question becomes acceptable?
Alternatively, if we're not allowed to make a duplicate of a 10-year old question, is there any way to mark an old question as "needs a revisit" which would bring it back to the top of the queue and to everyone's attention?