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Pictures | Thu Oct 13, 2016 | 4:35pm BST

Growing burgers in a lab

Journalists taste test the plant based hamburgers during a media tour of Impossible Foods labs and processing plant in Redwood City, California. REUTERS/Beck Diefenbach

Journalists taste test the plant based hamburgers during a media tour of Impossible Foods labs and processing plant in Redwood City, California. REUTERS/Beck Diefenbach

Journalists taste test the plant based hamburgers during a media tour of Impossible Foods labs and processing plant in Redwood City, California. REUTERS/Beck Diefenbach
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Workers assemble the plant-based hamburger patties during a media tour of Impossible Foods labs and processing plant in Redwood City, California. REUTERS/Beck Diefenbach

Workers assemble the plant-based hamburger patties during a media tour of Impossible Foods labs and processing plant in Redwood City, California. REUTERS/Beck Diefenbach

Workers assemble the plant-based hamburger patties during a media tour of Impossible Foods labs and processing plant in Redwood City, California. REUTERS/Beck Diefenbach
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Workers arrange portions of the plant-based hamburger patties for testing during a media tour of Impossible Foods labs and processing plant in Redwood City, California. REUTERS/Beck Diefenbach

Workers arrange portions of the plant-based hamburger patties for testing during a media tour of Impossible Foods labs and processing plant in Redwood City, California. REUTERS/Beck Diefenbach

Workers arrange portions of the plant-based hamburger patties for testing during a media tour of Impossible Foods labs and processing plant in Redwood City, California. REUTERS/Beck Diefenbach
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A small scale fermentor using yeast to produce the leghemoglobin for a plant-based hamburger is displayed during a media tour of Impossible Foods labs and processing plant in Redwood City, California. REUTERS/Beck Diefenbach

A small scale fermentor using yeast to produce the leghemoglobin for a plant-based hamburger is displayed during a media tour of Impossible Foods labs and processing plant in Redwood City, California. REUTERS/Beck Diefenbach

A small scale fermentor using yeast to produce the leghemoglobin for a plant-based hamburger is displayed during a media tour of Impossible Foods labs and processing plant in Redwood City, California. REUTERS/Beck Diefenbach
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Plant-based hamburger patties are on display during a media tour of Impossible Foods labs and processing plant in Redwood City, California. REUTERS/Beck Diefenbach

Plant-based hamburger patties are on display during a media tour of Impossible Foods labs and processing plant in Redwood City, California. REUTERS/Beck Diefenbach

Plant-based hamburger patties are on display during a media tour of Impossible Foods labs and processing plant in Redwood City, California. REUTERS/Beck Diefenbach
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A small scale production line of the leghemoglobin for a plant-based hamburger is displayed during a media tour of Impossible Foods labs and processing plant in Redwood City, California. REUTERS/Beck Diefenbach

A small scale production line of the leghemoglobin for a plant-based hamburger is displayed during a media tour of Impossible Foods labs and processing plant in Redwood City, California. REUTERS/Beck Diefenbach

A small scale production line of the leghemoglobin for a plant-based hamburger is displayed during a media tour of Impossible Foods labs and processing plant in Redwood City, California. REUTERS/Beck Diefenbach
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Workers assemble the plant-based hamburger patties during a media tour of Impossible Foods labs and processing plant in Redwood City, California. REUTERS/Beck Diefenbach

Workers assemble the plant-based hamburger patties during a media tour of Impossible Foods labs and processing plant in Redwood City, California. REUTERS/Beck Diefenbach

Workers assemble the plant-based hamburger patties during a media tour of Impossible Foods labs and processing plant in Redwood City, California. REUTERS/Beck Diefenbach
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Engineering manager Adam Shanebrook displays a small scale fermentor using yeast to produce the leghemoglobin for a plant-based hamburger during a media tour of Impossible Foods labs and processing plant in Redwood City, California. REUTERS/Beck Diefenbach

Engineering manager Adam Shanebrook displays a small scale fermentor using yeast to produce the leghemoglobin for a plant-based hamburger during a media tour of Impossible Foods labs and processing plant in Redwood City, California. REUTERS/Beck...more

Engineering manager Adam Shanebrook displays a small scale fermentor using yeast to produce the leghemoglobin for a plant-based hamburger during a media tour of Impossible Foods labs and processing plant in Redwood City, California. REUTERS/Beck Diefenbach
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Journalists surround the plant-based hamburger patties on display during a media tour of Impossible Foods labs and processing plant in Redwood City, California. REUTERS/Beck Diefenbach

Journalists surround the plant-based hamburger patties on display during a media tour of Impossible Foods labs and processing plant in Redwood City, California. REUTERS/Beck Diefenbach

Journalists surround the plant-based hamburger patties on display during a media tour of Impossible Foods labs and processing plant in Redwood City, California. REUTERS/Beck Diefenbach
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Ingredients for plant-based hamburgers, including a protein gel, are on display during a media tour of Impossible Foods labs and processing plant in Redwood City, California. REUTERS/Beck Diefenbach

Ingredients for plant-based hamburgers, including a protein gel, are on display during a media tour of Impossible Foods labs and processing plant in Redwood City, California. REUTERS/Beck Diefenbach

Ingredients for plant-based hamburgers, including a protein gel, are on display during a media tour of Impossible Foods labs and processing plant in Redwood City, California. REUTERS/Beck Diefenbach
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The completed plant-based hamburger is displayed during a media tour of Impossible Foods labs and processing plant in Redwood City, California. REUTERS/Beck Diefenbach

The completed plant-based hamburger is displayed during a media tour of Impossible Foods labs and processing plant in Redwood City, California. REUTERS/Beck Diefenbach

The completed plant-based hamburger is displayed during a media tour of Impossible Foods labs and processing plant in Redwood City, California. REUTERS/Beck Diefenbach
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