2011-11-29
[public] 408K views, 6.03K likes, 70.0 dislikes audio only
The Professor discusses new research suggesting why gold (among other dense metals) is found close to the Earth's surface.
Our thanks to everyone at the Central Deborah Gold Mine in Bendigo, especially Joel. http://www.central-deborah.com/
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Periodic Videos films are by video journalist Brady Haran