Nineteenth-century chemists already knew soil breathes. The twentieth added names, antibiotics and then too much DNA.
Frank's mycorrhiza (1885) and Hellriegel's nodules taught that roots are not alone.
Timeline
Albert Bernhard Frank coins mycorrhiza for fungus-root unions.
Sergei Winogradsky shows microbes can live on inorganic chemistry.
Nitrogen fixation in legumes is tied to living root nodules.
Early textbooks treat soil as a biological system, not mere dirt.
Selman Waksman's lab isolates a soil-derived tuberculosis drug.
After rRNA methods spread, soil becomes a catalogue of unseen lineages.
Direct DNA from soil skips culture.
Consortia try to map soil biomes the way oceans were mapped.
History is farms, compost and the clinic's debt to dirt.
Keep exploring
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