Evolution has given humans a huge advantage over most other animals
As a 42-year-old man born in England, I can expect to live for about another 38 years. In other words, I can no longer claim to be young. I am, without doubt, middle-aged.
To some people that is a depressing realization. We are used to dismissing our fifth and sixth decades as a negative chapter in our lives, perhaps even a cause for crisis. But recent scientific findings have shown just how important middle age is for every one of us, and how crucial it has been to the success of our species. Middle age is not just about wrinkles and worry. It is not about getting old. It is an ancient, pivotal episode in the human life span, preprogrammed into us by natural selection, an exceptional characteristic of an exceptional species.