Explore the lesser-known activities at CERN in this 59-minute conference talk from Devoxx. Delve into the world of mechanical engineering, climate science, machine learning, GPU computing, and quantum technologies as Derek Mathieson, Principal Software Engineer, and Dr. Sofia Vallecorsa, researcher in Scientific Computing, Machine Learning, and Quantum Computing, provide insights into the diverse work conducted at the world's largest scientific instrument. Gain a deeper understanding of the engineering challenges and cutting-edge technologies employed by CERN scientists and engineers in their quest to unravel the mysteries of the universe.