there's a twin study they took identical twins genetically identical in denmark and they said okay let's look at them through their life and there were massive differences in 00:08:46 how they looked and how they how long they lived and when they went back to see what the causes were they could figure out first of all that 80 of their lifespan was determined by how they lived not their genetics 00:08:58 you mean the way they felt about themselves the people they hung out with their environment the activities they took on or what do you mean well mostly their lifestyle what they ate did they smoke did they drink did they exercise those did they sleep well all that stuff right 00:09:11 and those that did all the good things the same genetics twins born the same day one could live 10 years longer than the other