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 Henkel other being Stefka Kostadinova. She was also very successful at the Hochsprung mit Musik meeting, taking the title three times consecutively from 1991 to 1993 and securing a record fourth win in 1995. From 1989 to 2001, she was married to swimmer Rainer Henkel. On 30 April 2004 she married decathlete Paul Meier. <br> Heike Henkel Heike Henkel (born Heike Redetzky on 5 May 1964) is a German former athlete competing in high jump. She won the high jump gold medal at the 1992 Summer Olympics in Barcelona. Henkel was born in Kiel, Schleswig-Holstein. Having competed for West Germany at