Hanni Rutzler, a food researcher from Austria, tastes the world’s first lab-grown beef burger during a launch event in west London on Monday. Photo: Reuters

Hanni Rutzler, a food researcher from Austria, tastes the world’s first lab-grown beef burger during a launch event in west London on Monday. Photo: Reuters

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Hanni Rutzler, a food researcher from Austria, tastes the world’s first lab-grown beef burger during a launch event in west London on Monday. Photo: Reuters

Hanni Rutzler, a food researcher from Austria, tastes the world's first lab-grown beef burger during a launch event in west London on Monday. Photo: Reuters

Hanni Rutzler, a food researcher from Austria, tastes the world’s first lab-grown beef burger during a launch event in west London on Monday. Photo: Reuters