Chef Rich McGeown prepares to cook the world’s first lab-grown beef burger during a launch event in west London on Monday. Photo: Reuters

Chef Rich McGeown prepares to cook the world’s first lab-grown beef burger during a launch event in west London on Monday. Photo: Reuters

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Chef Rich McGeown prepares to cook the world’s first lab-grown beef burger during a launch event in west London on Monday. Photo: Reuters

Chef Rich McGeown prepares to cook the world's first lab-grown beef burger during a launch event in west London on Monday. Photo: Reuters

Chef Rich McGeown prepares to cook the world’s first lab-grown beef burger during a launch event in west London on Monday. Photo: Reuters