I actually think it’s really one that is quite apt is it's like rust okay so in the humans are really evolutionary designed to grow mature and reproduce okay but when we keeping had to captivity you put them in civilization we begin to see these other features emerging as we keep people alive longer and longer or mice or flies and that what we're seeing is like a contraction we've built to do one thing but then we keep it around longer and longer and you start to see rust get so what what is rust will rust is I'm is iron a exposed to water and oxygen here's all the chemistry if you want to go through it and through these reactive species and you end up with rust okay so it's an interesting chemistry but it's also an interesting biochemistry because it turns out there's no such different thing that occurs in our very bodies so this is a diagram on my dick Andréa in a cell and indeed one .
http://www.x4facts.com/synagen-iq/