Title of thread changed to bring it up-to-date. 
No one would have believed, in the first years of the 21st Century that Martian affairs were being watched from the timeless worlds of space....Fantastic, truly amazing footage, the amount of detail is a wonder to behold, thank you mosaix for sharing this with us, I wonder what Giovanni Schaiparelli, H.G. Wells and Percival Lowell would think of this, it would probably blow their minds!
The need for asymmetric markings might have originally been for such a purpose but then changing them into a code seems like a simple (and neat) modification.'Hidden Message' in Mars rover parachute.
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'Dare mighty things': hidden message found on Nasa Mars rover parachute
Social media users say message is encoded in red-and-white pattern on parachutewww.theguardian.com
I thought the markings were so it was possible to tell if the parachute was rotating.