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: Road to Hell Russobit-M the story actually takes place somewhere in Colombia, while in the version published by Atari it was changed to fictional country Realia. It is unknown why the plot was changed in this way. Boiling Point: Road to Hell Boiling Point: Road to Hell ("Xenus: Точка кипения", "Xenus: Boiling Point") is a video game developed by the Ukrainian game studio Deep Shadows and published in 2005 by Atari. Boiling Point's gameplay is a combination of open world, FPS, and role-playing video game mechanics. Critical response upon its release was, with few exceptions, lukewarm. This was attributed to the many technical