It may have played a part. But this week, officials told Congress they were still investigating the causes of the so-called flash crash.

VOA: special.2010.05.14

The scientists suggest that this causes a reduction in pressure on the land where the plates meet.

VOA: special.2009.07.07

This is a protein that causes inflammation, a physical reaction to infection, injury or other causes.

VOA: special.2009.04.14

They believed scientists could study this illness to understand its causes and find a cure.

VOA: special.2010.07.21

This causes buds to the side, called lateral buds, to wake up and start growing.

VOA: special.2009.10.06

One form of this enzyme makes the prostaglandin that causes pain and swelling.

VOA: special.2010.12.14

This causes lower blood pressure, reduced muscle tension and decreased heart rate.

VOA: special.2009.03.24

This gas causes itchy skin,dizziness, and in high enough quantities,death.

VOA: special.2010.11.10

This causes the rock to break, or fracture,releasing the gas.

VOA: special.2009.10.23

This causes her to continuously leak urine or feces.

VOA: special.2010.08.09

This causes great stress on the human body.

VOA: special.2010.07.27

Doctors do not know what causes this process.

VOA: special.2009.01.06

This causes the tissues to die.

VOA: special.2010.08.09

This causes cells to become larger.

VOA: special.2010.07.27

They have been charged with being elected on the Change and Reform list, and this causes us grave concerns,".

VOA: standard.2009.04.09

Anna Bligh says the causes of this environmental disaster will be thoroughly examined.

VOA: standard.2009.03.13