He discusses how scientists over the years have identified the experience and developed theories to explain it.

VOA: special.2010.02.24

The researchers did not try to identify the causes of the increase, but they have some theories.

VOA: special.2009.08.06

Critics say the messages show climate change scientists discussing ways to discredit other theories about global warming.

VOA: special.2009.12.12

During the next ten years he tried to fit the theories about how children develop with what mothers told him about their children.

VOA: special.2009.03.15

The work and theories of Sigmund Freud continue to influence many areas of modern culture.

VOA: special.2010.04.13

Many of Freud's theories about how the mind works also had strong sexual connections.

VOA: special.2010.04.13

Mister Lowell's theories were based on what were serious scientific studies of that time.

VOA: special.2010.07.11

And his theories about waterways and complex life on Mars have been disproved.

VOA: special.2010.07.11

To test their theories, the scientists genetically engineered the mutation in mice.

VOA: special.2009.08.26

Mister Lowell's theories about Mars also influenced Edgar Rice Burroughs.

VOA: special.2010.07.11

Historians have theories.

VOA: special.2009.08.17

Owens dispelled Hitler's theories on the track, winning gold medals in the 100 and 200 meters, 4x100-meter relay and long jump.

VOA: standard.2009.08.19

Pakistani governments use these theories to stoke fear and unify the people, says Ayesha Siddiqa at Johns Hopkins University.

VOA: standard.2010.07.08

But Hollis says Iranian conspiracy theories have always seen Britain as the key supporting player, or even as the grand covert manipulator.

VOA: standard.2009.07.02