W. Grey Walter was a British neurophysiologist and robotics pioneer, known for his work in the mid-20th century. He is best recognized for creating simple autonomous robots called tortoises, which demonstrated basic behaviors resembling those of living organisms. These robots were designed to mimic certain aspects of biological systems, showcasing the potential for machines to exhibit lifelike characteristics. Walter's research contributed significantly to the fields of cybernetics and artificial intelligence. His experiments explored the relationship between machines and their environments, influencing future developments in robotics and the understanding of complex systems. His work remains relevant in discussions about the intersection of biology and technology.