John Harp was able to identify the type of brick in the wall shown behind Lucy
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It is not for lack of trying. In some cases, microbiologists have ditched the Petri dish altogether, using microfluidics for manipulating and growing cells. However, these approaches aren’t likely to be adopted at scale as they require less common, less practical, and more expensive devices. So, what about other growth media?
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Drag out a search region below and watch the brute-force approach check every point, one by one: