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8 موسم
128 قسط
Superscience - Season 7 Episode 14
Thousands of miles below the Earth's surface, a molten core generates a magnetic shield to protect us from solar radiation. But the protection could be fading and may be a sign that the magnetic poles are on the verge of flipping.
- سال: 2011
- ملڪ: United Kingdom, United States of America
- نوع: Documentary, Sci-Fi & Fantasy
- اسٽوڊيو: National Geographic
- چاٻي: technology
- ڊائريڪٽر:
- اداڪار: