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
Boiling Point (1990 film) kickboxing skills in Japan. He also played a guard in Takeshi Kitano's "Takeshi's Castle" in the 1980s. The original title, "3-4X Jugatsu", is the final score of a baseball game played in the film. "Jugatsu" (October) was added to the title, because the most exciting games of baseball, play-off games, are played in October. Boiling Point (1990 film) Boiling Point, known in Japan as , is a 1990 Japanese film written by, directed by, and co-starring Takeshi Kitano. It was his second film as director and first film as a screenwriter. "Boiling Point" is seen as an important first step