Mike Tobar explains how quantum "duality" limits ultra-precise measurements.Mike breaks this standard quantum limit of measurement precision in order to explore things as diverse as dark matter, gravity waves, and radar. Duality is the fact that everything (photons, particles, ..., people, planets) are best described as both particles and waves at the same time - but that's not the only mind-bending idea in this episode. The search for dark matter means looking for a subatomic particle that has cosmic size, and  Mike describes experiments using giant ultra-cold tuning forks that can ring for days! Have you ever wondered whether Doctor Who is a quantum particle? Subscribe and share with your friends. We'd love to hear your quantum questions - send them to engage@equs.org and we'll try to answer them in future episodes!