Isotopes of helium a thousand times lower than helium-4 (2.17 K). This difference is explained by quantum statistics, since helium-3 atoms are fermions, while helium-4 atoms are bosons, which condense to a superfluid more easily. The most common isotope, , is produced on Earth by alpha decay of heavier radioactive elements; the alpha particles that emerge are fully ionized nuclei. is an unusually stable nucleus because its nucleons are arranged into complete shells. It was also formed in enormous quantities during Big Bang nucleosynthesis. Terrestrial helium consists almost exclusively (99.99986%) of this isotope. Its boiling point of 4.2 K is the lowest of
Lowest of the Low (book) countries. It became Germany’s largest literary post-World War II success. The publication of Wallraff’s book increased the European public’s interest in the mistreatment and social isolation of foreign workers. There were also investigations into illegal employment agencies as a result. In an effort to help foreigners, Günter Wallraff created “Ausländersolidarität” (“"Solidarity with Foreigners"”), a fund to assist newcomers in Germany. Lowest of the Low (book) Lowest of the Low or Lowest of the Low: the Turkish worker in West Germany is the English translation of German journalist Günter Wallraff’s book Ganz unten (“At the bottom”), originally published in Germany in