Liquid helium of liquid water. Helium was first liquefied on July 10, 1908, by the Dutch physicist Heike Kamerlingh Onnes at the University of Leiden in the Netherlands. At that time, helium-3 was unknown because the mass spectrometer had not yet been invented. In more recent decades, liquid helium has been used as a cryogenic refrigerant, and liquid helium is produced commercially for use in superconducting magnets such as those used in magnetic resonance imaging (MRI), nuclear magnetic resonance (NMR), Magnetoencephalography (MEG), and experiments in physics, such as low temperature Mössbauer spectroscopy. The temperature required to produce liquid helium is low because
Heike ondo Heike ondo Heike ondo (平家音頭) is a Japanese folk song that originates from Shimonoseki, Yamaguchi Prefecture in Japan. The song is basically a narrative of the Battle of Dan-no-ura, which was a major sea battle of the Genpei War, occurring at Dan-no-ura, in the Shimonoseki Strait. It is played during the summer to accompany the Heike Odori, which is the bon dance of the area. Heike Ondo has a quick, up-beat tempo, and it is always performed with particular taiko ensembles including two taiko drums and a sake barrel, called a "taru", each. A single drummer alternates between the two