Subscribe to Naked Science - http://goo.gl/wpc2Q1 Every other Wednesday we present a new video, so join us to see the truth laid bare... Ageing, or aging, is the process of becoming older, and one of the great mysteries of life. Death, like life, is an amazing biological process engineered into cells of the body. Just as our DNA dictates the timeline of our development it also puts a cap on how long we can live. Why does our appearance change so very much between the ages of 40 and 70. It’s more than wear and tear, it’s a process affecting every cell in our body. Every day cells clone themselves in their billions, the DNA inside is also copied, as old cells die off, the new ones take their place. The trouble is that this cloning system isn’t perfect, any imperfections in the DNA are also replicated. In a lifetime we make so many copies of our cells that even the tiniest errors accumulate with time, imperfection is exaggerated until cells eventually lose the ability to divide altogether. Clip from the critically acclaimed documentary “The Living Body”. Watch it here - https://www.youtube.com/watch?v=kvprxzfsYQU