Global Politics

South Africa and AIDS

South Africa's former leaders were criticized for downplaying the AIDS epidemic there. Now a new president and a new health minister are taking a different approach to fighting the disease. Rhoda Metcalfe reports on The World.


Why we can relax about sleep

A new study on sleep says even though you feel like you're chronically sleep deprived, you might be getting more sleep than you think. Jim Horne of Loughborough University tells John and Adaora why we might be getting exactly as much sleep as we need.


The Nobel Prize

The Nobel Prize for Medicine has been awarded in part to two French researchers who discovered the HIV virus. But another influential scientist in the field - an American - was left out. Anchor Lisa Mullins speaks with science journalist Jon Cohen.