Diatom

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See also: Algae
Electron microscope photo of a 10-micron-long diatom, Achnanthidium minutissimum (Kützing) Czarnecki.

Diatoms are single-celled algae living in water, encased in tiny glass shells. They are the bottom of the food chain. The mix of their populations serves as a good indicator of the health of a body of water. Algae, including diatoms, account for nearly a quarter of the world's oxygen.

The intricacy and symmetry of diatom fossils are renowned for their beauty[1].

  1. Diatoms of the Academy of Natural Sciences of Drexel University slideshow published online by Google. Last access 4/17/2022.