New Mars clay study suggests planet was too dry, hot for life
A new study of magma-formed Martian clay by French and US scientists suggests that Mars possibly never had free-flowing water. The new study contradicts previous studies that suggested the early environment of Mars had water believed essential for life.
The Dry Ice 'Snowflakes' of Mars
astroengine writes "After collecting the vast quantities of data gathered by orbiting Mars spacecraft, MIT scientists have uncovered some rather interesting facts about Martian snow. For starters, as the majority of the Mars atmosphere is composed of carbon dioxide, the snowflakes are made from CO2 ice — basically tiny particles of 'dry ice.' Also, the snowflakes are very small — approximately the size of a red blood cell. 'These are very fine particles, not big flakes,' said MIT assistant professor Kerri Cahoy in a press release. If you saw these 'snowflakes' fall, 'you would probably see it as a fog, because they're so small,' she added."
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