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Water worlds could support life.. Scientists challenges idea that life requires Earth clone

109 views · Published 3 September 2018 · 4:31 · Indexed 14 November 2026

Channel: Creative-Tube · 2018 · Science & Technology

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Ocean planets stay in 'sweet spot' for habitability longer than previously thought
Recent study found 1 in 3  extrasolar planets bigger than Earth is a waterworld

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WAS MARS EVER HOME TO LIQUID WATER?
Evidence of water on Mars dates back to the Mariner 9 mission, which arrived in 1971. It revealed clues of water erosion in river beds and canyons as well as weather fronts and fogs.

Viking orbiters that followed caused a revolution in our ideas about water on Mars by showing how floods broke through dams and carved deep valleys.

Mars is currently in the middle of an ice age, and before this study, scientists believed liquid water could not exist on its surface.

In June 2013, Curiosity found powerful evidence that water good enough to drink once flowed on Mars.

In September of the same year, the first scoop of soil analysed by Curiosity revealed that fine materials on the surface of the planet contain two per cent water by weight.

In 2017, Scientists provided the best estimates for water on Mars, claiming it once had more liquid H2O than the Arctic Ocean - and the planet kept these oceans for more than 1.5 billion years.

The findings suggest there was ample time and water for life on Mars to thrive, but over the last 3.7 billion years the red planet has lost 87 per cent of its water - leaving it barren and dry.

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