Explore the universal properties of weakly bound two-neutron halo nuclei in this 46-minute conference talk by Dam Thanh Son from the University of Chicago. Recorded as part of the Opportunities and Challenges in Few-Body Physics: Unitarity and Beyond KITP conference, delve into the fascinating world of few-body physics near unitarity. Discover the connections between atomic and nuclear physics, focusing on the three-body Efimov effect and other universal principles. Gain insights from this cross-disciplinary platform that brings together theory and experiment across various research areas, including nuclear, atomic, molecular, condensed matter, high-energy, and mathematical physics.