Leiden University at the university. The learning and reputation of Jacobus Gronovius, Herman Boerhaave, Tiberius Hemsterhuis and David Ruhnken, among others, enabled Leiden to maintain its reputation for excellence down to the end of the 18th century. At the end of the nineteenth century, Leiden University again became one of Europe's leading universities. At the world’s first university low-temperature laboratory, professor Heike Kamerlingh Onnes achieved temperatures of only one degree above absolute zero of −273 degrees Celsius. In 1908 he was also the first to succeed in liquifying helium and can be credited with the discovery of the superconductivity in metals. The
Heike Kubasch Heike Kubasch Heike A. Kubasch is a game designer who has worked primarily on role-playing games. Heike Kubasch was one of the original principles of Iron Crown Enterprises, along with Pete Fenlon, S. Coleman Charlton, Richard H. Britton, Terry K. Amthor, Bruce Shelley, Bruce Neidlinger, Kurt Fischer, and Olivia Fenlon. Kubasch wrote "" (1982), the first Middle-earth campaign supplement book published by ICE as a "Rolemaster" supplement. Kubasch later became the President of Mjolnir LLC, with Bruce Neidlinger as CEO. Kubasch and Tim Dugger authored the game "HARP: High Adventure Role Playing" (2003) for Mjolnir. Her "D&D" design work includes