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01:43 Physical Science Promethium - Periodic Table of Videos Lesson duration 01:43 Manage Library 152,510 Views
01:51 Physical Science Lanthanum - Periodic Table of Videos Lesson duration 01:51 Manage Library 206,221 Views
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01:21 Physical Science Samarium - Periodic Table of Videos Lesson duration 01:21 Manage Library 172,052 Views
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00:50 Physical Science Hafnium - Periodic Table of Videos Lesson duration 00:50 Manage Library 166,197 Views
00:39 Physical Science Holmium - Periodic Table of Videos Lesson duration 00:39 Manage Library 73,486 Views
03:37 Physical Science Ytterbium - Periodic Table of Videos Lesson duration 03:37 Manage Library 161,742 Views
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01:44 Physical Science Actinium - Periodic Table of Videos Lesson duration 01:44 Manage Library 120,798 Views
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19:02 Psychology The pattern behind self-deception - Michael Shermer Lesson duration 19:02 Manage Library 66,502 Views