Martian 'Happy Face' Crater
Astroturtle writes "The two pictures shown here are taken from the same daily global image mosaic (the only difference is that each was processed slightly differently). The pictures show Galle Crater, informally known as 'Happy Face,' as it appeared in early southern winter."
A while back, Terry Pratchett wrote a book called 'Strata' in which the main plot premise was that Humans were terraforming the entire galaxy planet by planet, leaving 'history' inside those planets in the form of fake fossils and layers of rock. Occasionally, a 'prank' would slip through like the boot-prints in the sediment-strata or a digitial watch embedded in a seam of coal.
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The Happy Face motif is seen all throught the graphic novel/comic book "Watchmen" written by Alan Moore. One scene, set on Mars, has the reader's point of view pull back from a Martian crater to reveal a Happy Face.... all it needs is the splash of blood on one corner near the left eye...
If you've not read "Watchmen", I'd highly recommend it, along with "From Hell". Both are excellent stories and the art in them is superb.
Dr Fish