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POPSMantle Helium-3 in Geothermal Power The geochemists examined the ratio of helium-4 (the garden-variety helium that lifts birthday balloons) and its rarefied cousin, helium-3. The earth's crust contain just one helium-3 atom for every 100 million atoms of helium-4. But helium-3 is a thousand times more common in the earth's mantle.
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POPSGaia Mythos and the Promise of a Lonely Planet The Sophia narrative is an imaginative picture of human origins based on the experience of Gnostic seers. The Anthropos template is central to Gnostic cosmology, and closely related to the enigma of the Archons.
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POPSGeologic Controversies
The Quaternary Refuses to Die http://geology.about.com/od/controversies/a/aa022005a.htm How the International Stratigraphic Commission dealt out the whole Quaternary Period in 2004. The Piltdown Plot http://www.clarku.edu/~piltdown/Preface&gratitude.html "As we approach the 100th year anniversary of Piltdown Man, there is still no certainty on just who created the greatest hoax in the history of science." A thorough treatment by two professors at Clark University. A Modest Proposal http://geology.about.com/od/climate_change/a/Medit_dam.htm An old man dreams of damming the Mediterranean Sea to save the world from global COOLING. Logos versus Lithos: Creationism versus Evolution http://geology.about.com/cs/evolution/a/aa062297a.htm How Adam saw Eden is not how Darwin saw Earth. The Comeback of Noah's Flood http://geology.about.com/library/weekly/aa080899.htm The book "Noah's Flood" has brought the Bible back into science for the kernel of truth that might lie in the Flood
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POPSWhiff of ancient oxygen turns back clock Oxygen was toxic to early life forms. The 'Great Oxidation Event' changed the environment so these organisms could not survive apart from some places where oxygen is excluded, like deep sea vents. This event gave the opportunity for a new strand of life to develop of which we are a part.
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POPSCooling the Planet One 2,000 kilometers in diameter and about 10 microns thick, with a weight of about 100 megatons under Earth's gravity. Early's shield would have been either opaque or else transparent in the form of a Fresnel lens (the kind of lens used in lighthouses, in which the amount of material required is reduced from that needed in a conventional spherical lens because the lens is broken into concentric annular sections).
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POPSThe Ocean's Unforeseen Genomic Bounty Scientists can extract the genetic material from a drop of seawater and then sequence that DNA, deriving genomic clues into all the organisms living in that environment. Researchers focused largely on analyzing new protein-coding sequences, rather than on identifying specific microorganisms, because the variety of DNA made it difficult to assemble into single genomes. (DNA sequences generated from a drop of seawater contain fragments from the genomes of many different microorganisms. Scientists liken this to trying to put together a puzzle from a box containing a few pieces from a thousand different puzzles.)
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