WBEZ brings you fact-based news and information. Sign up for our newsletters to stay up to date on the stories that matter.At age 14, Hannah Salwen convinced her family to sell their big house and donate the money to an organization working to eradicate hunger and poverty in Africa. Hannah and her father wrote about it in their book The Power of Half. And, an epidemiologist shares his research that suggests countries with smaller income differences between rich and poor have better life expectancy rates and fair better on a range of social indicators. Plus, a new restored edition of the 1959 film Black Orpheus is out on DVD. Film Contributor Milos Stehlik reflects on the film’s influence.