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
What We Did What We Did What We Did is a collaborative studio album by Swans frontman Michael Gira and Windsor for the Derby member Dan Matz. It was released on November 13, 2001 through Gira's Young God Records label. "What We Did" has a considerably more pop-oriented and accessible sound, compared to Gira's other solo works. The majority of the lyrics on the album was written by Matz. Allmusic critic Thom Jurek described the album as "a finely wrought album of relayed styles and layered textures enfolding one another into a music that could have only been made by these two men,