Dr. Juliet Daniel’s passing from metastatic breast cancer is a profound loss to science, to McMaster University, to the Caribbean and Canadian communities that shaped her, and especially to the Black research community she helped make more visible, and connected. She leaves a legacy defined not only by discovery, but by courage: the courage to ask urgent questions, to confront inequity directly, and to make room for those too often left outside the laboratory door.
Born in Barbados and drawn to Canada as a young student, Dr. Daniel first imagined a life in medicine. Personal tragedy redirected that calling. After losing people she loved to cancer, including her mother, she turned toward research, determined to understand the disease at its roots and to contribute to knowledge that could change outcomes for others. That determination became the foundation of an extraordinary career in cancer biology.
At St. Jude Children’s Research Hospital, Dr. Daniel discovered the gene she named Kaiso, after her favourite Caribbean dance and the vibrant calypso music she loved. The name itself reflected something essential about her: she carried her heritage, her joy, and her identity into the highest levels of scientific inquiry without apology.
Later, as a professor at McMaster University, her work on Kaiso helped deepen scientific understanding of aggressive cancers, particularly triple-negative breast cancer (TNBC), a form of the disease that disproportionately affects young Black women. In pursuing this research, she insisted that cancer biology could not be separated from health equity. Through her own experience as a patient, she became an increasingly powerful voice for ensuring that scientific discovery does not end at publication but reaches the people and the communities it is meant to serve. Recently, she spoke candidly about the responsibility of the scientific community to close the gap between discovery and patient impact, and just as importantly, about the need to sustain the people doing this work, advocating for balance, well-being and more human culture in science.
As a co-founder of the Canadian Black Scientists Network, Dr. Daniel helped build a national community dedicated to elevating, celebrating and connecting Black scientists in Canada. Through that work, she expanded the imagination of what Canadian science could look like. She mentored emerging scholars, partnered with community organizations, raised awareness about breast cancer in underserved communities, and championed equity, diversity, inclusion and accessibility, not as slogans, but as obligations.
To honour Dr. Juliet Daniel is to remember a dedicated scientist, a generous mentor, a proud Barbadian-Canadian, and a builder of pathways. It is also to continue the work she advanced: research that not only discovers, but delivers; a scientific enterprise that values both impact and humanity; and institutions that recognize and uplift Black brilliance.
Dr. Daniel will be missed by all those that knew her, shared her passion, and were shaped by her remarkable life.
We thank BCC researchers Dr. Carrie Simone Shemanko (University of Calgary), Dr. Lisa Porter (University of Windsor), and Dr. Paola Marignani (Dalhousie University) for sharing this tribute.
