NASA | Mars Evolution
Billions of years ago when the Red Planet was young, it appears to have had a thick atmosphere that was warm enough to support oceans of liquid water - a critical ingredient for life. The animation shows how the surface of Mars might have appeared during this ancient clement period, beginning with a flyover of a Martian lake. The artist's concept is based on evidence that Mars was once very differ
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動画ランキング - ニコニコ動画
The Korowai Tribe (amazing tree-house builders from BBC's Human Planet).mp4
