Secrets of the Earth
Magnetic Shield (1x7)
Udgivelsesdato: Jun 27, 2013
An examination of Earth's metallic core and how it contributes to a magnetic shield that protects the planet from harmful space radiation.
- Premieret: Maj 2013
- Afsnit: 17
- Følgere: 5
- Slut
- The Weather Channel
- Ukendt