Cordoba locals have even been known to use canned tomatoes in deep winter.

WSJ: Salmorejo the Way Mama Makes It

Airlines made deep cuts in winter because of high fuel prices, he says, and don't have all the planes they might want in summer to meet demand.

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In small streams, fish find refuge in deep pools to ride out the winter.

CNN: Migrating fish get help in uphill battle

The oil, which affected 1, 300 miles of rugged coast, penetrated deep into the cobble beaches, especially in the areas sheltered from the winter storms that can help clean the beaches.

BBC: Oil spills: What is the long-term damage?

The geothermal system heats and cools using piping that goes deep within the earth, where temperatures are warmer than outside air in the winter and cooler in the summer.

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It's mid-winter in South Africa - a season of clear skies, bone-chilling temperatures, and deep, tetchy gloom.

BBC: Winter means strike time in South Africa