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A biosignature is any characteristic, element, molecule, substance or feature that serves as evidence for past or present ...
Life on Mars sounds like something from a "Doctor Who" episode. But a study published in the International Journal of Astrobiology challenges the science fiction notion of that idea. The ...
NASA released photos and video of a Martian moon passing between the planet and the sun. The occurrence is common on Mars, lasting around 30 seconds.
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