It's probably nothing but an optical illusion remember the Face on Mars?

也许他什么也不是，只是一种错觉还记得火星上的神秘人脸吗？

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Humorously, this brain-terrain on Mars spans about a kilometer, making it just about the right size to fit inside the rock formation once dubbed the Face on Mars.

相当有趣的是，这个脑状火星地貌的大小约有一公里，大小很适合放在暱称为火星之脸的岩石堆里。

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In one photo, a hill on Mars' surface looked a little like a face.

在一张照片中，火星表面的一座山看上去有点像一张脸。

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I once landed on my face. I soon learned that it took much less effort for me to move on Mars than it did on Earth.

VOA: special.2010.07.10

Radiation on a Mars trek would be higher than what crew members cocooned inside the International Space Station typically face about 200 millisieverts per year.

NPR: Astronauts Face Radiation Threat On Long Mars Trip