Only two populations of purple catspaw were known of previous to Mr. Hoggarth's amazing discovery. With his findings, he has increased the suspected population of these mussels by at least seventeen percent. Also, the other to colonies of purple catspaw seem to not be breeding, but this newly found populace is.

Hoggarth's search for more encampments of p

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Mussels are not the only species dying out, many more freshwater species are threatened too, along with birds. A scientist by the name of Stuart Pimm is applying mathematics to ecology problems. He is attempting to calculate the global progress of extinction. To do this, Pimm has studied fossilized marine invertebrates to map out an accurate table of ancient life. Pimm then used this table to determine the average number of species that went extinct over one year, excluding the periods off mass extinction like the dinosaurs. This figure was found to be one tenth to one species per year per million species. When these numbers are compared to modern day rates, the diffe

Some common words found in the essay are:
Killback Creek, Stuart Pimm, Creek Ohio, Michael Hoggarth, , purple catspaw, fresh water, gone extinct, water mussels, fresh water mussels, species fresh water, species fresh, killback creek, mussels unionoids,
Approximate Word count = 506
Approximate Pages = 2 (250 words per page double spaced)