An amazing piece of fan mail.
Precious metals video: http://youtu.be/Fg2WzCzKpYU
Gold Vault video: http://youtu.be/CTtf5s2HFkA
More chemistry at http://www.periodicvideos.com/
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From the School of Chemistry at The University of Nottingham: http://bit.ly/NottChem
Periodic Videos films are by video journalist Brady Haran: http://www.bradyharan.com/
A run-down of Brady's channels: http://bit.ly/bradychannels
