Read the paper and ignore the article. They investigate a more detailed model of the galaxy than a single arithmetic equation and draw sensible conclusions abou

Read the paper and ignore the article. They investigate a more detailed model of the galaxy than a single arithmetic equation and draw sensible conclusions about how different priors might actually affect (or rather, how some of them curiously don't affect) different properties of the distribution of life in our galaxy. For example, where in the galaxy we would expect most life to form.