Ytterby Mine (source of many elements) - Periodic Table of Videos
14:35
Hafnium - Periodic Table of Videos
16:48
YTTERBY Mine: The Heavy Hitter of the Periodic Table!
2:16
One Town, Four Elements: Ytterby
20:36
RHENIUM (new) - Periodic Table of Videos
12:44
Ytterbium - Periodic Table of Videos
13:28
Alternative Periodic Table
2:00:00
Dark Violin & Cello Music for Deep Focus
3:03