"It is the only piece of science I've ever done that's really emotionally got me," he says.
William Harwood
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Before agar, microbiologists had experimented with other foodstuffs as microbial media. They turned to substances rich in the starches, proteins, sugars, fats, and minerals that organisms need for growth, testing with broths, bread, potatoes, polenta, egg whites, coagulated blood serums, and gelatine. However, none worked particularly well: all were easily broken down by heat and microbial enzymes, and their surface, once colonized, became mushy and unsuitable for isolating microbes.
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A Secret Soviet Plan to Nuke America From the South Pole Was Working. Until UFO Hunters Looked Up.