Micrometeoritic Neon on the Earth.

Ozima and Podosek (2002) clearly state: "In summary, there is still no satisfactory theory on the origin of terrestrial noble gases". This view is also supported by Porcelli and Pepin (2000), who note: "there still is no consensus on how the terrestrial noble gases originated". Two of the major problems with the distribution of noble gases on the Earth concern: [ABSTRACT FROM AUTHOR]