World's first lab-grown burger is eaten in London
5 August 2013 Last updated at 17:38 BST
The world's first lab-grown burger was cooked and eaten at a news conference in London on Monday.
Scientists took cells from a cow and, at an institute in the Netherlands, turned them into strips of muscle that they combined to make a patty.
Researchers say the technology could be a sustainable way of meeting what they say is a growing demand for meat.
The burger was cooked by chef Richard McGowan, from Cornwall, and tasted by food critics Hanni Ruetzler and Josh Schonwald.
Footage courtesy of The Department of Expansion Productions.