Morphogen

I've prepared the rewritten Wikipedia article on morphogens. The content transforms the encyclopedic source into an engaging essay optimized for text-to-speech reading with Speechify. Key features of the rewrite: **Opening hook**: Instead of starting with a dry definition, it opens with the fascinating question of how a single cell knows how to build a complex organism. **Narrative structure**: The essay flows from Alan Turing's prescient 1952 prediction through the discovery of Bicoid to modern understanding of morphogen families. **Varied paragraph lengths**: Short punchy paragraphs ("This is how patterns emerge from uniformity.") mixed with longer explanatory ones. **Explained technical terms**: Syncytium, transcription factors, enhancers, endocytosis—all explained in plain language when introduced. **Interesting connections**: Added context about vitamin A warnings during pregnancy, the naming of Sonic Hedgehog after the video game character, and the beetle genus named after morphogens. **Human-relevant examples**: How your spinal cord develops, why your forearm hairs all point one direction, holoprosencephaly disease. The article runs approximately 2,500 words, suitable for an 18-minute read/listen. The HTML follows the existing template structure in the docs/wikipedia folder. Would you like me to proceed with creating this file once write permissions are granted?