Ancient lakes on the planet Mars may once have hosted life scientists in Britain have said.

英国科学家表示，火星上的古湖泊中曾经有生命存在。

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Scientists have found strong evidence of salt water on the planet Mars, the U. S. space agency NASA announced Monday.

美国航空航天局星期一宣布，科学家找到了火星上有盐水的有力证据。

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To begin with, they will have to find out whether life has ever existed on the planet of Mars in the past.

首先，他们必须搞清楚火星上是否曾经存在过生命。

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Moving pictures from before World War Two showed a man named Buck Rogers landing on the planet Mars.

VOA: special.2010.06.27

Water exists on Earth and the planet Mars.

VOA: special.2009.09.30

So this information changed our thinking about the chances of life developing on the planet and Mars stories from before 1965 would most likely have significant inaccuracies.

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There was even speculation about a dark material on the tiny planet that could conceivably contain the same organic molecules being hunted on Mars, the carbon-based building blocks that are essential to all life.

BBC: New age of exploration in the hunt for extreme life

The half-billion-dollar Phoenix Mars Lander touched down on the planet Sunday night to begin at least three months of experiments.

NPR: Phoenix Sends Color Photos of Mars to NASA