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Editor's pick Caution required when tinkering with plant diet 8 July, p 17 From Matthew Stevens, Sydney, Australia While the gradual shift to a more sustainable, plant-based diet globally is a good thing, I feel some concern at the news that UK company Moolec has created soya beans with 25 per cent pig protein. In this view, a sufficiently complex brain is necessary, but not sufficient, for consciousness to arise, and if that is so, we need have no worries about even much larger lab-grown brains that need constant supervision to stay alive. Grounds to say lab-grown brains aren't conscious Letters, 24 June From James Whalley, Hinchinbrooke, Quebec, Canada Eric Kvaalen says that if consciousness arises out of brains, we should stop experiments on lab-grown organoids. [Extracted from the article]