Andrew Steptoe, professor of epidemiology and public health, University College London
Jon Hamilton, science correspondent, NPR
Mary "Yogi" Wess, executive director, Little Brothers: Friends of the Elderly, Cincinnati Chapter
Researchers from University College London followed thousands of people over the age of 52 for seven to eight years to assess the effect of loneliness and isolation. Isolation, not loneliness, may actually shorten people's lives regardless of health or income.