Altering photographs was part of Joseph Stalin's effort to Change historical facts.
<h3>Can historical facts be altered?</h3>
There are a lot of cases where familiar history seems to be changed or altered.
The act of revisiting often changes the interpretations in a lot of ways by historians and as such, altering photographs was a means used by Joseph Stalin's effort to change of historical facts.
Geologists use the following tests to distinguish minerals and the rocks they make: hardness, color, streak, luster, cleavage and chemical reaction. A scratch test developed by a German mineralogist Friedrich Mohs in 1822 is used to determine mineral hardness.
