90th Anniversary Issue: 1920s

Rise of quantum theory
Science News-Letter was born only a few years before the greatest scientific revolution since Newton, a revolution that transformed Niels Bohr’s “old quantum theory” of the atom into the modern understanding of quantum mechanics. Beginning in 1925, Werner Heisenberg (above), Erwin Schrödinger, Max Born, Paul Dirac and others created the math of physics’s future, culminating in Heisenberg’s famous uncertainty principle.