This video was made with the support of the Heising Simons Foundation. Support MinutePhysics on Patreon! Link to Patreon Supporters: This video is about the Ozma problem of distinguishing the chirality (ie left-handedness or right-handedness) of matter using weak interaction processes like beta decay (for example in uranium), or neutral kaon/k-meson decay. This is wrapped up in the phenomenon of CP violation, by which charge and parity are both violated by certain weak interaction processes - this enables antimatter to be unambiguously distinguished from matter, and left handed chirality from right handed. REFERENCES The Ozma Search for Extraterrestrial Intelligence (SETI) Project Sean Carroll on CP Symmetry (& why we shouldn’t trot out baryogenesis all the time) Electroweak CP Violation on Scholarpedia The Wu Experiment Martin Gardner, The New Ambidextrous Universe Lecture notes on CP Violation and the CKM Matrix, Cambridge (Mark Thomson) Homochirality L-glucose (vs D-glucose) Radioactive Nucleus Decay CP Violation in Semi-Leptonic Decays (SEE PAGE 426 for reference to definition of MATTER) Kaon Decay Modes Flipped bowling Jesus scene in Big Lebowski Isotopes of Uranium Beta Decay The Wu Experiment Kaons CP Violation in Symmetry Magazine Physics Stack Exchange on CP Violation MinutePhysics is on twitter - @minutephysics And facebook - And Google+ (does anyone use this any more?) - Minute Physics provides an energetic and entertaining view of old and new problems in physics -- all in a minute! Created by Henry Reich