| July 15
Earth's Last Survivors? | | |
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| | Last survivors on Earth? | | | Scientists say tardigrades - tiny, 8-legged marine animals - can survive until the sun dies, long after we humans have disappeared. | | | Strange radio signals from nearby star | | | A 10-minute observation of the star Ross 128 yielded a peculiar radio signal. The scientists aren't saying "aliens," but the natural explanations have weaknesses. | | | | | | | | | |
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|  | | | Tonight … Ophiuchus, 13th constellation of Zodiac | | The sun passes in front of Ophiuchus each year from November 29 to December 17. | | | | | |
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 | | | What is a green flash? | | A green flash is an optical phenomenon that you can see shortly after sunset or before sunrise. Hans Hillewaert captured this green flash over the North Sea in Belgium. How to see one yourself … plus more pics here. | | | | |
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