They are left to grow naturally so the most desirable roots -- those most similar to wild ginseng -- are produced.

VOA: special.2009.04.07

A better idea is to harvest foods either early or late in the day, then leave them to cool naturally.

VOA: special.2009.11.30

Plants naturally take in carbon dioxide they need for photosynthesis, the process of changing light energy to chemical energy.

VOA: special.2010.01.26

The process releases some carbon dioxide, but Rajan Vempati says it would be reabsorbed into the soil naturally.

VOA: special.2009.12.01

Yet he thought that slavery would die out naturally over time -- and that outsiders should not force southerners to end slavery.

VOA: special.2009.02.09

These flutes were cut from the naturally curved area of ivory from an animal -- the mammoth.

VOA: special.2009.08.18

Naturally enough, the researchers also wanted to learn if music written for people would interest the monkeys.

VOA: special.2009.09.29

The National Institutes of Health says levodopa is a chemical found naturally in plants and animals.

VOA: special.2009.04.07

The antibodies were discovered in a man, known as Donor 45, whose body produced them naturally.

VOA: special.2010.07.14

Marian said she always sang naturally, without any thought of how she did it.

VOA: special.2009.01.18

"Pireeni's poetry is naturally lyrical, and the basis of all lyrical poetry is music.

VOA: special.2011.05.09

But some orchids that grow naturally are in danger of disappearing from Earth.

VOA: special.2010.04.06

This hormone is produced naturally by the pituitary gland in the brain.

VOA: special.2011.04.12

Interferons are genetically engineered copies of proteins found naturally in the body.

VOA: special.2009.01.06