We stopped in the afternoons to fish for a few minutes in little rivers turned black by the acid of cypress trees.

VOA: special.2010.01.30

Soil should also be tested for its pH level, a measure of the acid and alkaline balance.

VOA: special.2009.06.09

But it is the first time an amino acid has been discovered on a comet.

VOA: special.2009.09.30

Domoic acid is a powerful neurotoxin produced by one kind of microalgae.

VOA: special.2011.03.15

A chromosome contains molecules of deoxyribonucleic acid, better known as DNA.

VOA: special.2009.12.08

DNA methylation shows chemical changes in a person's deoxyribonucleic acid,or DNA.

VOA: special.2009.11.24

Company engineers admit the lead acid battery wasn't technically advanced enough to run a car.

VOA: standard.2010.07.30

I wrote this son, my father and I wrote this song, for the acid victims of Kandahar City -- a few young girls who were trying to make their way home from school when they got attacked by acid.

VOA: standard.2010.03.08