>>509466252 (OP)people tend to think cancer has been around forever I tend not to think that. just look at all the diseases present today and all the things you can die from and basically all there is are treatments not cures, if all the things that exist today that contribute to death were around for thousands of years or even hundreds humans would have been extinct a long time ago, therefore most of the diseases and illnesses around today have to be manmade, caused by human involvement, things we consume etc.