http://www.flickr.com/photos/hortonh...ho/2351922923/
I found very strange zig-zag lines in above Martian image link.
Do Earth rocks have similar zig-zag lines after a Rock Abrasion Tool
(RAT) has brushed them?
Could those zig-zag lines result from RAT's brushing different layers
of organic tissues instead of inorganic rock?