Austria was the cradle of numerous scientists with international reputation. Among them are Ludwig Boltzmann, Ernst Mach, Victor Franz Hess and Christian Doppler, prominent scientists in the 19th century. In the 20th century, contributions by Lise Meitner, Erwin Schrödinger and Wolfgang Pauli to nuclear research and quantum mechanics were key to these areas' development during the 1920s and 1930s. A present-day quantum physicist is Anton Zeilinger, noted as the first scientist to demonstrate quantum teleportation.