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Circle of diatoms on a slide (detail). Source: Wipeter via Wikipedia Commons
Circle of diatoms on a slide (detail). Source: Wipeter via Wikipedia Commons

Natural Selections: Diatoms

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Diatoms are fascinating creatures that share some qualities of both plant and animal. Dr. Curt Satger and Martha Foley talk about these water-borne oddities that inhabit the base of the food chain in geometric "glass houses" of their own construction.

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