Further afield four per cent are optimistic there will be a permanent human base on Mars while one in ten expect a colony of humans to be living in space.

有4%的人想得有点远，他们乐观地相信到时候火星上会有一个永久性人类基地，而十分之一的人认为2025年会有人移民太空。

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One way for human missions to Mars is to set up a base on the moon to be used as a steeping-stone.

把人类送上火星进行探测的一种方法，是在月球上建立一个基地，用来作踏脚石。

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One could think of many reasons for considering a human base on Mars - such as over-population on Earth - but Darlene Lim is mainly motivated by the thrill of exploration.

BBC: Destination Mars on Earth