Hello, I'm trying to compile a list of factors that could cause a DNA strand to be damaged or modified (denaturalized). I'll list a few that I can think of, if you can add some or nix some of mine, please help me and reply, thanks. 1. Radiation (like gamma rays from the sun) 2. Chemicals (compounds like benzene that bind to the dents [I forget the technical word] in DNA's helical shape.) 3. Viruses (viruses that insert their own genes to that transcriptase produces clones of themselves) Going out on a limb now.... 4. Environmental stress 5. Adaptation and Evolution (human tail bones are vestiges of primate tails) 6. Low Energy Radiation (Radio, Microwave, IR, Visible light?) 7. Bacteria???