Community participant predictions

Assembly Square is flooded by rising sea levels, caused by climate change.
(source: Maureen Barillaro. To see all of her predictions, click here.)

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Tufts University expands, and takes over Somerville.
(source: Anonymous)

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Somerville now has an artisan craft and food mart where people can come and sell food they've make at home.
(source: Brad. To see all of his predictions, click here.)

Other predictions

December 21, 2012
The world ends.
(source: the ancient Mayans)

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No date given
The sun reverses its own magnetic poles as a result of reaching the end of the current 11-year sunspot cycle.
(source: Wikipedia, quoting NASA)