There is a very interesting report (http://www.theguardian.com/science/2014/jun/13/earth-may-have-underground-ocean-three-times-that-on-surface) that a volume of water, some 3 times that in all the world's oceans, may be trapped in the Earth's mantle in a water-trapping mineral called Ringwoodite (after its discoverer). This may be one reason why the oceans have remained relatively constant over millions of years and casts doubt on the idea that our seas were generated by icy comets colliding with the forming planet.
This blog may help people explore some of the 'hidden' issues involved in certain media treatments of environmental and scientific issues. Using personal digital images, it's also intended to emphasise seasonal (and other) changes in natural history of the Swansea (South Wales) area. The material should help participants in field-based modules and people generally interested in the natural world. The views are wholly those of the author.
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