Setting out first thing in the morning, especially on an autumn or winter day, when you might get some atmospheric fog on the water, you can almost fool yourself into feeling that you are journeying back into the past.

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This information has been provided by Radarsat, a Canadian satellite capable of detecting detailed water and land features through thick clouds, fog and rain using synthetic-aperture radar equipment.

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When fog forms below 0C, its super-cooled water droplets remain liquid, even though the temperature is below freezing.

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