Researchers at the University of Michigan say a substance developed from the spices could reduce the possibility of breast tumors.

VOA: special.2010.06.01

The World Health Organization says hundreds of millions of people throughout the world are affected by mental,behavioral,neurological or substance use disorders.

VOA: special.2010.04.13

The researchers say their study shows a vaginal gel substance reduced the risk of HIV infection among women who used it.

VOA: special.2010.07.21

Shekhar Saxena is director of the Department of Mental Health and Substance Abuse at the World Health Organization.

VOA: special.2011.02.16

Scientists at the Goddard Space Flight Center in Greenbelt,Maryland, found the substance glycine in material brought back to Earth from a comet.

VOA: special.2009.09.30

Some people believe that Sarah studied the hair product she used and added her own "secret" substance.

VOA: special.2010.03.28

Her experiments for the project were supposed to produce a clear substance similar to a thick syrup.

VOA: special.2010.02.09

Scientists in the Washington area have been working with keratin, the main substance in poultry feathers.

VOA: special.2010.06.01

He made everything - except coffee - from sourdough, a substance used in making sourdough bread.

VOA: special.2009.01.24

Later,Mizz Blackburn and Mizz Greider discovered the substance in the body that builds telomeres.

VOA: special.2009.10.07

Ultraviolet light from the sun changes a substance in the skin into vitamin D.

VOA: special.2009.04.21

The black substance that trapped the animals came out of the Earth as oil.

VOA: special.2010.04.07

Drop several seeds over the surface of the pot and cover with a thin layer of vermiculite, a substance that can hold air, water and nutrients.

VOA: special.2009.04.21

The more the big cat struggles, the deeper it sinks into the black substance.

VOA: special.2010.04.07