Donald Johanson is a prominent paleoanthropologist best known for discovering the fossil of a 3.2-million-year-old hominid known as "Lucy" in 1974 in Ethiopia. This remarkable find revolutionized our understanding of human evolution, as Lucy represented one of the oldest and most complete hominid skeletons ever uncovered. Her discovery provided critical insights into the bipedalism of early humans and highlighted the complexity of our ancestral lineage. Throughout his career, Johanson has contributed significantly to the field, leading numerous expeditions in East Africa and publishing extensively on human origins. He has also played a crucial role in educating the public about paleoanthropology and has worked to inspire future generations in the sciences. His insights have helped bridge the gap between scientific research and public interest in human ancestry. In addition to his research, Johanson founded the Institute of Human Origins, which aims to foster a deeper understanding of human evolution through interdisciplinary studies. His influential work continues to impact the field, encouraging both scientific inquiry and public engagement with our evolutionary history. Donald Johanson is a renowned paleoanthropologist famous for discovering "Lucy," a pivotal 3.2-million-year-old hominid fossil. His work revolutionized our views on human evolution and bipedalism, furthering knowledge of our ancestral lineage. Through his expeditions and the Institute of Human Origins, Johanson continues to promote research and understanding of human ancestry.