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 (1993 film) from critics. It currently holds a 20% on Rotten Tomatoes based on 10 reviews. Audiences polled by CinemaScore gave the film an average grade of "C-" on an A+ to F scale. Boiling Point (1993 film) Boiling Point is a 1993 American action film written and directed by James B. Harris, and starring Wesley Snipes, Dennis Hopper, Lolita Davidovich and Viggo Mortensen. The film was released in the United States on April 16, 1993. This was James B. Harris' last film. It is based on the novel "Money Men" by former U.S. Secret Service agent Gerald Petievich, who co-wrote the