Scientists recently studied the effects of mechanical thinning on two kinds of pecan trees in the southeastern United States.

VOA: special.2009.11.10

He captured images of the spot and studied a picture that he had taken earlier of the same area on Jupiter.

VOA: special.2009.08.25

Scientists studied clouded leopards on the islands of Borneo and Sumatra, and in mainland Southeast Asia.

VOA: special.2010.06.22

The United States Public Health Service and Tuskegee Institute in Alabama studied the effects of the disease syphilis on a group of poor African-American men.

VOA: special.2010.07.21

Different scientists have studied the effects of extreme conditions on the human mind and body.

VOA: special.2010.02.24

Language expert Barry Popik studied the question and wrote about it on his Web site.

VOA: special.2009.12.27

She studied communities like farmers in Southern California who depended on a common water supply.

VOA: special.2009.10.16

Scientists first studied the effects of calorie restriction on aging in the nineteen thirties.

VOA: special.2009.09.01

Researchers studied the pathways on which dopamine travels in fifty-three adults with A.D.H.D.

VOA: special.2009.09.29

Percival Lowell also studied the effect of gravity on the planet Neptune.

VOA: special.2010.07.11

Mutallab,an engineering student who studied in Britain, told investigators he was acting on instructions from al-Qaida and got the explosive materials in Yemen.

VOA: standard.2009.12.26