DAVID A. HARDY / SCIENCE PHOTO LIBRARY DAVID A. HARDY / SCIENCE PHOTO LIBRARY
History of Mars observation. Artwork of a historical sequence of images of Mars, showing the improvement in observation methods over time. The earliest image (grey/black) is shown at upper right, with the most recent at lower centre (orange/black). An image representing a fictional "War of the Worlds" style attack by Martian beings on Earth is seen at bottom left.
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