In laboratories at Imperial College London, scientists have coaxed lettuce and tobacco plants into producing myoglobin — the protein that gives meat its color, iron, and savory depth — by inserting cattle and pig genes directly into the plants' chloroplasts. The achievement represents a quiet but significant turn in humanity's long negotiation between appetite and ecological consequence, offering a path toward protein abundance that asks less of the land, the water, and the atmosphere. Whether this botanical alchemy can travel from seedling to supermarket remains an open question, but the proo