This was followed by years of further scientific study and travel.

Perhaps your son will one day want to do a scientific study of this issue.

As yet, however, very little attempt has been made at scientific studies along such lines.

Very little scientific study have been conducted on these states.

So where's the money come from for all these scientific studies?

Sure, there is no such thing as a perfect scientific study.

However, his focus was on the scientific study of the animals.

Animals have often been used in the history of scientific study.

Still, the data from years of scientific studies are mixed.

But there aren't any scientific studies to back that up.