Morals are an invention of mankind, and they differ between social groups or individual people due to differences in values and beliefs. There's no objective measure of what is wrong or right, since everyone has different morals. Even if everyone in the world agreed on the same morals, it would just be humans sharing an opinion as there is no accurate way to determine the validity of one's moral views. Morals are just the personal beliefs and opinions of humans, whether as a group or as individuals.
Scientific facts can not be compared to morals, as they are not based on opinions, but things that we have been able to know and determine as facts through research. Scientific facts don't vary from person to person. Even if someone chooses to discount a fact, it is still factually correct and accurate. We don't know everything about everything, or even close, but what we do know is based in fact rather than opinion.