What causes aging?
Genes and environment are just two of many factors that determine how our bodies age. Life experiences and habits can also have a positive or negative effect on us.
As we get older, we become physically less like our peers. That's because we are the sum of our life experiences. At age six, not too much has happened to our bodies to make us radically different from our peers. But by middle and… » Full Story on HowStuffWorks
As we get older, we become physically less like our peers. That's because we are the sum of our life experiences. At age six, not too much has happened to our bodies to make us radically different from our peers. But by middle and… » Full Story on HowStuffWorks
