The Pew Forum on Religion and Public Life did a study in two thousand seven on major religious traditions in the United States.

VOA: special.2010.03.05

A new study has found the strongest evidence yet that smoke-free laws can reduce a major effect of tobacco smoking - heart disease.

VOA: special.2009.01.07

The findings all come from a major health study in the American town of Framingham,Massachusetts.

VOA: special.2010.01.06

The study involved bollworms, a major threat to cotton farmers.

VOA: special.2010.05.25

They recruited pregnant women who suffered from major depressive disorders for a study.

VOA: standard.2010.03.03

A researcher with South Africa's Center for the Study of Violence and Reconciliation, Glen Mpani, said a major impediment to peace and reconciliation is the culture of impunity that has evolved.

VOA: standard.2009.06.21