Guardian: On Monday, just after lunchtime, Dr Mark Post will make culinary (and scientific) history by cooking a beefburger and eating it. Which sounds mundane except that this burger cost 250,000 to make and has been painstakingly assembled from meat grown in his laboratory at Maastricht University. Post's burger will be constructed this weekend from tens of thousands of strands of protein grown, in petri dishes, from cattle stem cells. These cultured muscle fibres will be taken out of deep freeze and carefully...