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Welcome to Sidewalk Crack Flora!
Have you spotted a rosette pressed into a pavement joint or a tiny flower between slabs? You are welcome to browse the forums and add your own observations of curbside soil pockets and trampled refuges. No account is needed to read along.
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NASA’s Chandra Observatory Reveals a Giant Cosmic “Treble Clef”
Astronomers have traced a giant radio structure resembling a musical treble clef back to two events separated by millions of years. An outburst from a...
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