Expanding Earth hypothesis
The Expanding Earth hypothesis (or Growing Earth hypothesis) may refer to several different but similar and related observations about the geological life of the planet, all essentially holding that the volume of the Earth (and potentially other planets) has increased through history, and that this change in volume can explain phenomena such as continental drift. Advocates have proposed several distinct causes of the increased volume, including: thermal expansion; a change in the gravitational constant; increasing mass; a ballooning effect, producing a hollow cavity in the Earth's interior.
Prior to the wide-spread acceptance of the theory of plate tectonics, variations of this hypothesis (and even its direct opposite, the Contracting Earth hypothesis) were widely discussed in the conventional geologic circles.
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- Carey, S. W. (1961), "Palaeomagnetic evidence relevant to a change in the Earth's radius", Nature 190: 36
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- Carey, S. W. (1970), "Australia, New Guinea, and Melanesia in the current revolution in concepts of the evolution of the Earth", Search 1 (5): 178-189
- Adams, Neal (2006), Gravity and Pressure and Why the Earth Doesn't Have a Molten Iron Core, nealadams.com, https://web.archive.org/web/20061115060356/http://www.nealadams.com/EarthProject/gravity_and_pressure.pdf
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