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February has been a turbulent month for DJI. The Chinese tech giant, best known for making drones, escalated its fight against the U.S. drone ban by suing the FCC. Then the internet erupted over an entirely different DJI device: The Romo robot vacuum.
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Photograph: Molly Higgins
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It is difficult to know exactly when the shift from gelatine to agar occurred. As often happens for scientific breakthroughs, agar was likely adopted incrementally alongside the use of other growth media. In 1913, for example, the first diagnosis of Serratia marcescens as a human pathogen was made by growing it on agar as well as on potatoes.