Researchers believe the increase in heart rate might demonstrate what they call the fight or flight response.

VOA: special.2009.08.18

"What has happened this thing has evolved and as we have been able to refine the flow rate estimates."

VOA: standard.2010.06.14

Scientific research is progressing at such an alarming rate I think it's impossible to know what ten years from now will hold."

VOA: standard.2010.06.09

"But what it means is, if the world is going to grow at the rate it can in the future, the rest of the world is going to have to shift to more domestic sources of growth, investment,and spending,".

VOA: standard.2009.11.12