Ozone holeSept. 21, 1938: The New England Hurricane slams into Long Island, Connecticut, and Rhode Island, killing 600 people. An estimated 12-foot storm surge floods downtown Providence.

Sept. 21, 1918: John Gofman, a physicist who sounded some of the earliest warnings about the danger of radiation, is born in Cleveland, Ohio.

Sept. 21, 2006: From this day till Sept. 30, 2006 — the end of the Antarctic Winter — saw the largest ozone hole ever, covering 10.6 million square miles, according to NASA and NOAA scientists.

Photo: NASA/Wikimedia Commons

This feature is compiled by Peter Dykstra, an MNN contributor and publisher of Environmental Health News and The Daily Climate.

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