How do we all know about this, but Peter didn’t? What tools do we have today that Peter’s world, 200 years ago, didn’t have? (about 3 sentences)

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the "power" of a lens is its resolution power, or its ability to distinguish between to closely located points. with the low power lens, it is likely you will see the rough form of the hay and maybe some movement of dots around the hay. however, when observed with the high power lens, the detailed features of the hay become visible and the microbes being grown are more clearly visible.

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