A glacial "Lake Chicago" was formed as glaciers receded at the end of the last ice age. Its boundary, at a higher elevation, became a Native American trail, and is now Clark Street.
December 13 at 1:54 PM
The city's geese were nearly extinct as of 1962. They exist in such huge quantities now because of a 1967 "Cooperative Giant Canada Goose Project" to restore the species.
December 7 at 3:26 PM
The Chicago River previously emptied into Lake Michigan around Madison Street
November 28 at 5:06 PM
Seiches, small but often destructive and sometimes fatal tidal waves, hit Chicago about once every ten years, and reach heights of over ten feet.
November 26 at 6:14 PM
Aqua, the 82-story skyscraper with wavy balconies, is the tallest building in the world designed by a woman.
November 12 at 7:52 PM
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