When was the three domain system created?

The three-domain system was introduced in 1990 by Carl Woese and his colleagues. Their groundbreaking research on ribosomal RNA (rRNA) sequences revealed significant genetic differences between prokaryotes, leading to the identification of Archaea as a distinct domain separate from Bacteria. This molecular evidence prompted the reclassification of life into three domains: Archaea, Bacteria, and Eukarya.