小惑星や彗星が地球に与える刺激的な影響を探求します。このシリーズでは、彼らの環境への影響や歴史的意義を明らかにする魅力的なビデオを特集しています。
Planetary science
1 mins • Apr 12, 2010
Charts
- 186Decreased by 8
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