Officials have said they cannot speculate on the cause of the crash.

VOA: standard.2010.05.23

We talked last week about a new report on preterm births the leading cause of death in newborn babies worldwide.

VOA: special.2009.10.26

They found the highest levels of solar activity cause small, but far-reaching effects on weather systems around the world.

VOA: special.2009.09.29

They said the government acted because of fears that the crisis would cause a run on the banks.

VOA: special.2009.04.26

"After many years of trying to figure out what is going on with the genetic cause of depression, we're still not there yet."

VOA: special.2009.06.24

Dr.Paul Offitt of Children's Hospital of Philadelphia says it is time to move on and find the real cause for autism.

VOA: standard.2010.03.23

Indonesia is on the so-called Pacific Ring of Fire where several tectonic plates meet and often cause earthquakes.

VOA: standard.2009.09.03

We can start now to focus our attention on the real cause or causes of autism.

VOA: standard.2010.03.23

"If we are serious about confronting the Islamic Republic of Iran, we have got to use all of the economic and diplomatic tools at our disposal to focus pressure on that country and its leadership to cause them to stop pursuing their plans to become a nuclear power,"

VOA: standard.2009.05.20