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or you could look and see
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what it's like at any point in its interior structure.
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We're very sophisticated at using light
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to make images like this now on microscope stages.
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One could take very beautiful pictures of biological objects
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like cells with different kinds of optical techniques.
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Here's--this is familiar to you, this is a glomerulus.
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I told you what a glomerulus was last week,
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but this shows sort of the tuft of capillaries
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inside a glomerulus imaged by light microscopy.
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Well, how do I take advantage of this kind of microscopy
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but look at these kinds of images inside people?