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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Sitcom star Valerie Cherish (Lisa Kudrow) returns for a third and final season of HBO's The Comeback, created by Michael Patrick King (Sex and the City) and Kudrow. The show's first two seasons premiered in 2005 and 2014, offering up biting (and prescient) looks at sitcoms, reality TV, and the entertainment industry as a whole.