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Martian shadows

February 2013: This Groundhog Day, remember that all shadows involve science — not rodents.
bob_berman_2009
Get ready for the strangest of our national traditions.
 
Imagine if aliens arriving in the far future find a newspaper from our time and try to figure out Groundhog Day.
 
“Seems these humans held up a woodchuck at sunrise!” exclaims the first Vulcan. “If the animal saw its shadow, Earth’s storm systems grew. That’s what they believed.”

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