Diproton
A diproton is a hypothetical type of helium nucleus consisting of two protons and no neutrons. Diprotons are not stable under the existing laws of physics, but it has been speculated that if the strength of the strong nuclear force had been only 2% greater then all protons would bind together into stable diprotons. This situation is sometimes called a "diproton catastrophe", since life as we know it would be impossible in such a universe; stars would burn by the strong interaction, which proceeds 1018 times faster than the weak interaction that controls stellar fusion in our universe.
External linkshttp://www.origins.org/articles/leslie_prerequisiteslife.html
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