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Life on Mars? The Red Planet's atmosphere once contained MORE oxygen than Earth but a catastrophic collision caused the air to shrink and may have killed off an alien race
Friday, July 19, 2013 4:19
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19 July 2013 – ’Solar wind, and the possible impact by a Pluto-sized body is thought to have stripped much of the initial early atmosphere from the planet, and since then the atmosphere has developed as a balance between volcanic injection and loss to space.’
Curiosity rover found Mars’s atmosphere was once thicker and wetter
It is believed to have contained oxygen long before Earth’s atmosphere did
Yet no methane was found, which would have suggested life’s still there
Nasa scientists now believe a collision with a Pluto-sized planet caused the air to shrink and may have killed off any lifeforms
Watch the video: Searching for Mars’ Missing Atmosphere
Theory: There was interest in what may have existed in the past on Mars, after Curiosity found that much of the planet’s atmosphere has been lost over time, suggesting it was once warmer
A team of Nasa scientists claim that a change in the ratio of two different kinds of argon gas is evidence that the atmosphere has been stripped away.
Nasa’s Dr Chris Webster said: ‘As Mars became a planet and its magma ocean solidified, catastrophic outgassing occurred while volatiles were delivered by impact of comets and other smaller bodies.