Waterhole home to plants that don't grow underwater elsewhere
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SA's spring-fed limestone waterhole home to plants not seen underwater
anywhere else in the world. The filtered limestone environment of the Ewens
Ponds pr...
Sunday, November 8, 2009
I have to find a research study for a school assignment in which the investigators actively manipulated an independent variable. I was browsing for journal articles in the areas of crime and public safety, when I remembered this article from the Journal Science that I noticed with great interest around the time it was published: Testing The Broken Windows Theory
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