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But she still has them, as well as autism and learning difficulties.

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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Now sitting on the inter-tidal mudflats of the estuary, they have created a new land mass on the edge of the existing saltmarsh at Northey Island.

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