Miss Carson and other scientists were very concerned about the harmful effects of DDT and other insect-killing chemicals called pesticides.

VOA: special.2010.03.14

He was fifty-three years old. J.Robert Oppenheimer and Enrico Fermi were two of the greatest scientists of the century.

VOA: special.2009.06.14

Scientists used to think that the islands were connected to the South American mainland and floated out to sea slowly.

VOA: special.2009.12.16

The scientists say seven hundred fifty large rock lobsters were released a year ago in waters near Tasmania's northeast coast.

VOA: special.2009.08.25

The report said information requests by scientists not connected with the Climatic Research Unit, the C.R.U.,were continually rejected.

VOA: special.2010.04.27

But those observations were made years ago and NASA scientists had not trusted the results without clear confirmation.

VOA: special.2009.09.30

The story of how space scientists were able to recover the material and bring it back to Earth is just as exciting.

VOA: special.2009.09.30

But scientists wonder how animals arrived on Galapagos if the islands were always so far from the mainland.

VOA: special.2009.12.16

The vehicle is helping scientists to see for the first time huge areas underneath the lake that were otherwise impossible to explore.

VOA: special.2009.06.03

While scientists were studying the stars and moon to solve the longitude problem, a man named John Harrison was working on another project.

VOA: special.2010.07.14

But when the telescope reached orbit, NASA scientists were shocked to discover that the costly mirror of the telescope had not been shaped correctly.

VOA: special.2009.09.30

He and other refugee scientists were worried that Germany was working to develop an atomic bomb.

VOA: special.2009.06.14

Doctor Hahn says the scientists discovered that infected chimps were ten to sixteen times more likely to die in any given year than uninfected chimps.

VOA: special.2009.09.08

The scientists said that about half of the coral species were new to them.

VOA: special.2010.08.10

By the nineteen eighties, scientists were working to complete the genome of human beings.

VOA: special.2010.03.23

Mister McAlpine said pictures of the animal were sent to scientists in Britain.

VOA: special.2009.06.16

Jews were not permitted to be scientists during the nineteen thirties in Italy.

VOA: special.2009.05.13

Scientists were excited about the moon rocks the astronauts brought back.

VOA: special.2009.07.29

Today,most scientists think the islands were always where they are now.

VOA: special.2009.12.16

Soon,scientists in labs around the world were using these cells.

VOA: special.2010.07.21

Although it was not a colorful picture, scientists were pleased.

VOA: special.2009.09.30

NASA hopes that Dawn's year long orbit around Vesta will help scientists learn more about the development of the solar system, and how asteroids and other space objects were created.

VOA: special.2011.07.27

Navy scientists were building the Vanguard for scientific purposes.

VOA: special.2009.06.10

Thousands of scientists,engineers, technicians and other workers were needed.

VOA: special.2009.06.17