Geochemists Challenge Key Theory Regarding Earth's Formation

Geologists call into question three decades of conventional wisdom regarding some of the physical processes that helped shape the Earth as we know it today. New research provides a direct challenge to the popular "late veneer hypothesis," a theory which suggests that all of our water, as well as several so-called "iron-loving" elements, were added to the Earth late in its formation by impacts with icy comets, meteorites and other passing objects.

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