Edward Willett

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Photo of the Day: Santa Colours

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Posted by Edward Willett at 3:57, December 20th, 2006 under Blog | Comment now »

Photo of the Recent Past: Backyard Snow

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Posted by Edward Willett at 5:37, December 14th, 2006 under Blog | Comment now »

Photo of the Day: Snow Benches

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Posted by Edward Willett at 5:11, December 9th, 2006 under Blog | Comment now »

Photo of the Weekend: Regina Street, December

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Posted by Edward Willett at 4:15, December 4th, 2006 under Blog | Comment now »

Sundogs

  When it's -25 and the wind's blowing, we tend to keep our faces turned firmly to the ground, with occasional glances up to make sure we're not about to walk into traffic. But if, during the recent cold spell, you were brave (or foolish) enough to raise your head, you may have been treated with the sight of two bright spots on either side of the sun: sundogs. It doesn't have to be cold for sundogs (also called "mock suns" or "parhelia") to form, but it helps. That's because they're caused by the refraction of light through ice crystals in the atmosphere. Light refracts, or bends, as it passes from one medium (for example, air) to another that's more dense ...

Posted by Edward Willett at 23:06, January 25th, 2000 under Blog, Columns, Science Columns | Comment now »

The winter brain

On a cold, dark January day, your brain just slips into neutral. Thoughts crawl along like a snail on sedatives, you can barely remember your own name, and higher functions like mathematics are simply beyond your ability. Right? Not according to a recent study. Apparently, our minds are actually sharper in the winter than in the summer! Like you, psychiatrists who study seasonal affective disorder (SAD), a.k.a. the "winter blues," have always assumed mental processes slow in the cold and dark of winter. But last year Tim Brennen, a psychologist at the University of Tromsø, Norway--the most northerly university in the world, 300 kilometres north of the Arctic Circle--decided to test the idea. Brennen gave ...

Posted by Edward Willett at 16:28, January 11th, 2000 under Blog, Columns, Science Columns | Comment now »

Seasonal affective disorder

Nobody (nobody human, anyway) likes getting up on a cold winter's day when it's still dark and the wind is howling, but for some people it's more than just unpleasant: it's almost impossible. They suffer from a form of depression called Seasonal Affective Disorder (also known, appropriately, as SAD). Seasonal depression has probably been around forever, but it's only recently been recognized as a legitimate medical problem. It's not easy to diagnose, either; although many people--as many as one in four--suffer from "the winter blues" (a.k.a. sub-syndromal SAD), a person can only be diagnosed as having SAD if he or she suffers three or more consecutive winters of some (or all) of: sleep problems (usually difficulty staying ...

Posted by Edward Willett at 16:21, February 5th, 1996 under Blog, Columns, Science Columns | Comment now »

Skating

  In Tulia, Texas, where I lived as a kid before we moved to Saskatchewan, when you said you were going "skating" it was understood it would be on a wooden surface with rollers attached to your feet. Imagine my shock, then, when I found out that up here, "skating" meant sliding on thin metal blades on ice. Until I tried it, I couldn't figure out how anyone could remain upright on ice skates. After I tried it, I still couldn't figure it out. (I also discovered that ice is harder than wood.) I gradually got the hang of it, but not having started until I was eight years old, and having terminally flat feet, I was skating-impaired compared to my ...

Posted by Edward Willett at 11:33, March 28th, 1995 under Blog, Columns, Science Columns | Comment now »

Skiing

  I've written about the skating, tobogganing and curling, but there's a major winter sport I've yet to explore (and no, it's not competitive car-boosting). That's probably because, while I've skated, tobogganed and curled, I have yet to strap two long, skinny pieces of fiberglass to my feet and go careening down a mountain or sliding around the lake. But I've been thinking about giving it a try. Skiing has been around for a long, long time. Greek historians mention various kinds of devices used to enable individuals to travel more easily over the snow, as do Norse myths. Ancient skis have even been found in bogs in Sweden and Finland. They consist of elongated curved frames covered with leather--and ...

Posted by Edward Willett at 4:38, January 14th, 1995 under Blog, Columns, Science Columns | Comment now »

Winter

I hate to be the bearer of bad news, but...it's winter. As I write this it's -28 outside, huge piles of snow line the streets, and tow-truck operators are gainfully employed all over the city. Winter is on everyone's minds, which must be why I was recently asked several winter-related questions by Colin Grewar, host of CBC Radio's Afternoon Edition. Such as: Q. Is it true no two snowflakes are alike? It depends on your definition of "alike." A snowflake begins when water inside a cloud condenses and freezes on a speck of dust or other particle. This tiny crystal grows as it falls, collecting more water vapour on its way. The V-shape of water ...

Posted by Edward Willett at 16:27, January 10th, 1994 under Blog, Columns, Science Columns | Comment now »