34:18

Jeff Tepper: Early Days Geochemistry

39:00

Jeff Tepper: Breakoff Geochemistry

27:21

Granite Falls Pluton w/ Jeff Tepper

30:11

Jeff Tepper: Farallon Plate Diving

20:46

Modern Life Depends on This Extinct Rock | Banded Iron Formations

41:27

Gary Paull: Ideas for 'Nick On The Rocks'

1:13:11

Valentina Zharkova:  Grand solar minimum is underway | Tom Nelson Pod #278

14:17

How the Elite rigged Society (and why it’s falling apart) | David Brooks