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[podcast]http://edwardwillett.com/wp-content/upLoads//2009/07/Stretching.mp3[/podcast]
There’s a perception that science is always reversing itself. If you don’t like what science has to say about, say, the health benefits or risks of a particular food (eggs, for example, or coffee), you only have to wait awhile until a contradictory study comes out.
That’s because science progresses in fits and starts. Researchers put forward a possible explanation, a hypothesis, for the results of an experiment. Other researchers attempt to duplicate their results and refine the hypothesis. Sometimes the hypothesis is completely discarded, and a new hypothesis gains sway.
But in the media, this slow process is seldom reported. It’s much easier to pick up on the report of a single study—particularly if it has startling results—and present the hypotheses ...
Posted by Edward Willett at 12:22, July 7th, 2009 under Blog, Columns, Science Columns |
It's summertime in Saskatchewan, and that means the roads are full of joggers, walkers--and bicyclists.
The first bicycle was the "celerifere," or wooden horse, invented in France in the 1790s. It had a fixed front wheel, so it couldn't be steered, and the rider propelled it by pushing his feet along the ground, like Fred Flintstone.
A German baron, Karl von Drais, added a steerable front wheel in 1817, creating the "draisienne," or dandy horse. In 1839, Kirkpatrick Macmillan, a Scottish blacksmith, added pedals which drove the rear wheel by means of cranks.
In the 1860s the French invented the velocipede, on which the pedals were attached directly to the front wheel, so that once ...
Posted by Edward Willett at 11:35, July 3rd, 2001 under Blog, Columns, Science Columns |
I wouldn't call myself a "serious" cyclist, since I don't wear neon Spandex shorts and top, a colour-coordinated helmet, leather gloves or fancy cycling shoes. Heck, I don't even have a water-bottle. But I do cycle a bit, and as I was puffing my way along the bike path the other day it seemed to me the time was ripe to write about the science of cycling. (Besides, I'm a sucker for alliteration.)
The first step in the development of the bicycle was the "celerifere," or wooden horse, invented in France in the 1790s. It had a fixed front wheel, so it couldn't be steered, and the rider propelled it by pushing his ...
Posted by Edward Willett at 11:33, November 8th, 1993 under Blog, Columns, Science Columns |
I hate exercise. It's uncomfortable, sweaty, and cuts into quality TV time.
Unfortunately, it's good for you.
Exercise is physical exertion for the purpose of improving physical fitness. (If it's for any other purpose, we call it "hard work.") Modern fitness programs got their start in Prussia in the 1800s (which should tell you something). Feminists took up the idea to prove that women are not frail, and in fact the word "calisthenics" was coined in 1831 by the headmistress of an American girls' school, from the Greek words kalos, "beautiful," and shenos, "strong."
The primary component of all exercise, from jogging to marathon ballroom dancing, is ...
Posted by Edward Willett at 11:47, May 27th, 1992 under Blog, Columns, Science Columns |