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originally posted by: DAVID64
a reply to: smurfy
do a Jeremy Clarkson on..
Good thread. I believe there was, at least, primitive life on Mars
originally posted by: hydeman11
Notice that the spherules in question are smaller than 0.4 cm, about 4 mm (much smaller than your sources...). Also notice the interpreted structure of cross-bedding. (requiring water movement). The "echinoderm" (crinoid/cystoid) stems would also be quite small compared to Earth crinoids, too.
originally posted by: templar knight
First picture shows broken "soil" half way up the picture and the colour of the broken soil i.e. below the surface being darker. I remember a similar effect when you dig sand near the edge of the sea, the sand below the surface is darker as it contains water.
But from the perspective of the Solar System, it's the same. Time actually flows a bit faster on Mars because of its lower gravity, but not so you'd notice much. How long it takes a planet to circle the Sun doesn't really matter much, unless that early life had a calendar to mark.
Mars also takes 1.887 Earth years to orbit the Sun, so a Mars year is twice as long as ours, so when we say 2 billion years ago.....in Mars time that is 4 billion years ago...to our Earth perspective.