Carl Woese

Carl Woese was a scientific revolutionary who worked in quiet persistence at the University of Illinois. Trained as a biophysicist, he became obsessed with the fundamental relationships between all living things. While others studied organisms in petri dishes, Woese looked for history in their genes, pioneering the use of ribosomal RNA as a molecular clock. His meticulous work in the 1970s led to a thunderclap revelation: a whole group of life, which he named Archaea, was not merely strange bacteria but constituted an entirely separate domain alongside Bacteria and Eukarya. This shattered a centuries-old classification system and forced textbooks to be rewritten. A fiercely independent thinker, Woese later championed the provocative idea that life began in an 'RNA world,' a hypothesis that continues to shape origins-of-life research. His legacy is a foundational, more accurate map of life itself.