|Polycarp. His name does not|
mean "many fish".
Christians have done this as well. For instance, "The Pre-Tribulation Rapture cannot be a valid doctrine because it does not appear in the writings of the church fathers". This an Appeal to Authority because the church fathers deserve a great deal of respect, but they were not writing Scripture. (It also leans a bit toward "argument from silence", but we'll deal with that one another time.) In this area, it does not matter whether or not the church fathers wrote on the subject.
Avoid going generic. "Scientists say/believe" is not very impressive, capice?
Be careful of a few things. First, simply because someone quotes an expert (someone who is actually skilled on the subject in question) does not necessarily mean that argumentum ad verecundiam is taking place. Second, depending on the situation, your expert may not have a Master's Degree in the subject, but may demonstrate good knowledge on the subject. Take that on a "case by case" basis. Third, citing experts can easily be used as a substitute for actual thinking, and may as well be an Appeal to Authority when practiced.
Now if you'll excuse me, my plumber is going to advise me on my new gun. He knows more about the Walther P-99 than I do. And we'll discuss some theology, because I am more skilled in that area than he is. But I won't tell him about his stock options!