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Animals
A giant 'shadow' has been creeping across Mars for 50 years — and scientists aren't sure why
April 20, 2026
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Posted 4 hours ago by
A dark patch in Mars' Utopia Planitia region has grown significantly since it was first photographed in 1976. Scientists have a loose understanding of what it is, but they can't properly explain its gradual growth.
Live Science
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