Using findings from various studies published in scientific and medical journals – with colour grading to signify the strength of the evidence – the next infographic could help you choose a path to Live Long…

The coloured bars spray out to the left and right of a central line.

The bars to the right suggest ways of prolonging life, and those to the left hint at how you could die younger.

Some studies have suggested that having sex and being religious could help you reach old age.

While, there is stronger evidence that suggests getting hitched – and not being short of cash – will also help.

The strongest evidence points, not surprisingly, to living a healthy lifestyle.

But… up a mountain?

McCandless concludes the perfect recipe for a long life is to be a “married happy go-lucky outdoors-loving sex-mad hippy party-girl in senior management with a cat”.