But here is something that scientists now know: A team led by Professor Fu has reported the first genetic link to how much sleep we need.

VOA: special.2009.08.26

You can also find a link to images by Michael Benson.

VOA: special.2010.07.28

Medical science, bolstered by research from the U.S.Environmental Protection Agency, shows a strong link between air pollution and heart disease and stroke.

VOA: standard.2010.08.04

So a tall chain-link fence keeps everyone away from it by about 50 meters.

VOA: standard.2010.02.17