Legged robots are amazing machines with a high degree of mobility that enables to navigate in unstructured environments. In this presentation, I'll talk about quadruped robots: the Mechanics behind their motion, general control frameworks, bio-inspired and AI-based motion generation and control strategies, and their many potential applications (like in catastrophic scenarios, inspection, agriculture, and space exploration). The talk will be interactive with robots from the Dynamic Legged Systems lab of IIT, including the 140kg HyQReal robot that pulled an airplane of 3.3 at Genoa's Airport.