David Lee (physicist)

David Lee's work is a testament to the profound discoveries that can emerge from the deep freeze. Born in 1931, he built his career at Cornell University, where a low-temperature laboratory became his world. In the early 1970s, alongside his graduate student Douglas Osheroff and colleague Robert Richardson, Lee pursued experiments on helium-3, a rare isotope, at temperatures just a few thousandths of a degree above absolute zero. Their meticulous measurements revealed a startling discontinuity—the helium had suddenly become a superfluid, a liquid capable of flowing without viscosity. This discovery, which earned them the 1996 Nobel Prize in Physics, opened a new window into quantum mechanics, showing how these bizarre quantum behaviors could manifest on a macroscopic scale. Lee's quiet persistence in the lab helped map a strange and fundamental frontier of the physical world.