In Brisbane, a team of medical researchers has done what no one had done before: assembled a complete map of how the human heart responds to chemical signals, and offered it freely to the world. Over five years, scientists at QIMR Berghofer grew miniature human heart tissues in the laboratory, exposed them to 87 biological messengers, and recorded what happened — building a living reference for a science that has long worked without one. The atlas, called Cardiopedia-Ligand, arrives not as a conclusion but as an opening, an invitation for researchers everywhere to ask questions the data might