So exactly how much exercise do you need to do to gain all of these great health effects?

VOA: special.2010.06.08

Doctors do not know exactly how the brain stimulation works to help patients with Parkinson's.

VOA: special.2009.02.03

It is unclear to scientists exactly how swearing affects physical reactions to pain.

VOA: special.2009.08.18

But Steven Slater is in a lot of legal trouble and details of exactly what happened on that JetBlue flight and how he acted are still up in the air.

VOA: special.2010.08.13

No one knows exactly how many mompreneurs there are.

VOA: special.2010.04.23

Exactly how is not clear yet.

VOA: special.2009.02.13

Danny says his new single, "I Will Not Say Goodbye," represents exactly how he felt after Sophia passed away.

VOA: standard.2010.07.29

"And the audience lets you know in real time exactly how they feel about your performance.

VOA: standard.2010.07.01

But because every farmer's field is different, figuring out exactly how much to use is complicated.

VOA: standard.2010.07.28

Queensland state Premier Anna Bligh said Friday the spill was larger than had been reported but did not say exactly how much oil was shed.

VOA: standard.2009.03.13

Mr.Obama admitted that there is uncertainty about exactly how much oil is being spilled.

VOA: standard.2010.05.14

It's still not exactly clear how the polyunsaturated fats confer this benefit.

VOA: standard.2010.03.25

Exactly how the differences in bacteria might make vaginally born babies less prone to allergies and asthma isn't yet clear, but it does point to a difference that researchers can look at going forward.

VOA: standard.2010.06.30