火星上的一天，长达二十四小时三十八分钟。腹中线

　　An epic journey revealing the real Mars, as you've never seen it before. Using data from orbiters and rovers to build accurate views of the red planet and uncover its secrets. On a single circuit of Mars from dawn to dusk, encounter monster volcanos, ancient lakes, alien ice-worlds and spacecraft crash sites. Explore humanity's Martian obsession, join the relentless search for ... (展开全部)