(NASA/National Geographic)
Washington - After the discovery of nitrate compounds in the rocks of Mars by Curiosity, this time an unmanned spacecraft NASA rover was again found some new evidence.
The evidence makes scientists suspect that the crater Crater on Mars was once a vast salt water lake.
Curiosity recently discovered calcium perchlorate compounds, compounds that can absorb moisture from the atmosphere, reports Nationalgeographic.
If the water vapor mixed with H2O, the mixture will make the freezing point of water is lower, allowing it to turn into a liquid at low temperature. Water resulting from the melting process is water containing salt.
Because the surface of the Martian soil is full of holes, scientists suspect water seep down to the bottom surface shaped like slope, and with a number of other salt water to form an underground lake.
The discovery of perchlorate compounds on Mars is also coupled with the discovery of the extension number of sedimentary rock, which allegedly formed by the flow of water towards the slope, forming a lake in the middle of the surface.
Scientists believe that in the past, about 4.5 billion years ago, Mars had a total of 6.5 times more water than they are now.
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