Will extraterrestrial, self-replicating robotic systems pave the way for building a sustainable industrial lunar ecology? Self-replicating robots are machines that can replicate themselves using materials found in their environment. The concept of self-replicating systems has been around for decades, ever since the mathematician John Von Neumann proposed theoretical models in the 1950s. Since then, research toward building self-replicating machines has evolved with advancements in robotic systems, 3D printing, and space exploration.  Now that NASA and other space agencies are focused on returning humans to the lunar surface, researchers like Professor Alex Ellery are developing new robotic systems capable of operating in extreme conditions like the moon. But Ellery is advocating for self-replicating machines, not as an egotistical, science fiction fantasy, but as a means to create a sustainable industrial lunar ecology, whereby precious resources like ice and regolith are recycled and reused. Tune in now to Episode 15 and find out why Professor Ellery stopped believing in ETs and started believing in self-replicating robots!