Society: Arts and Science – April 1

The Nobel Prize is bestowed annually in categories as selected by Swedish and Norwegian committees in recognition of cultural or scientific advances. The 1895 will of Swedish inventor Alfred Nobel established the prizes.
Richard Adolf Zsigmondy was born on this date in 1865. He was an Austrian-Hungarian chemist. He was known for his research in colloids, for which he was awarded the Nobel Prize in Chemistry in 1925. The crater Zsigmondy on the Moon is named in his honour.
Lev Davidovich Landau died on this date in 1968. He was a prominent Soviet physicist who made fundamental contributions to many areas of theoretical physics. His accomplishments include the independent co-discovery of the density matrix method in quantum mechanics (alongside John von Neumann), the quantum mechanical theory of diamagnetism, the theory of superfluidity, the theory of second-order phase transitions, the Ginzburg–Landau theory of superconductivity, the theory of Fermi liquid, the explanation of Landau damping in plasma physics, the Landau pole in quantum electrodynamics, the two-component theory of neutrinos, and Landau’s equations for S matrix singularities.[2] He received the 1962 Nobel Prize in Physics for his development of a mathematical theory of superfluidity that accounts for the properties of liquid helium II at a temperature below 2.17 K (−270.98 °C).