Diatom Skeletons and Their Uses
When diatoms die and their organic material decomposes, the frustules sink to the bottom of the aquatic environment. This remnant material is diatomite or "Diatomaceous earth", and is used commercially as filters, mineral fillers, mechanical insecticide, in insulation material, anti-caking agents, as a fine abrasive, and other uses. There is also research underway regarding the use of diatom frustules and their properties for the field of optics, along with other cells, such as those in butterfly scales.
Read more about this topic: Frustule
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“History counts its skeletons in round numbers.
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emptiness running down steps toward the garden,
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—Wislawa Szymborska (b. 1923)