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If you’re a kid interested in astronomy, as I was, there are few thrills to compare with your first view of the rings of Saturn. So you can imagine how excited astronomers (and ex-kids like myself) are with the imminent arrival of the International Cassini-Huygens Mission at Saturn.
The $3 billion space probe, launched October 15, 1997, is scheduled to enter orbit around Saturn on June 30. The maneuver place it there promises to be nailbitingly tense. Cassini will fire its main engine for 96 minutes to reduce its speed enough for it to be captured by Saturn’s gravity. As it enters orbit, it will pass right through one of the gaps in Saturn’s rings. It will ...
Posted by Edward Willett at 11:28, June 8th, 2004 under Blog, Columns, Science Columns |
How many times have you heard it said that "opposites attract"? From movies to books to musicals, it’s an idea that has been drummed into our heads: Katherine Hepburn and Humphrey Bogart in The African Queen, for instance, or Liza Doolitle and Henry Higgins in My Fair Lady.
But a new study has found that when men and women start seriously seeking a mate, they look for someone who is similar to them.
Stephen Emlen, a behavioral ecologist at Cornell University, conducted the study with Peter Buston, who is now at the University of California, Santa Barbara. They gave questionnaires to almost 1000 men and women aged 18 to 24. Each was asked to rank the desirability of ...
Posted by Edward Willett at 16:20, July 8th, 2003 under Blog, Columns, Science Columns |
It’s almost summer, that time of year when millions of vacationers develop whole new vocabularies as they curse the slow-moving RVs behind which they’re stuck.
What they need is a car that can fly, a.k.a. an aircar, a staple of science fiction stories since at least the 1930s, but something that hasn’t gotten off the ground...yet.
Nevertheless, as a recent story in Technology Review points out, new technology may soon make it a reality.
The biggest problem with the aircar dream has always been the fact that ordinary drivers would presumably be at the controls (scary thought). But today’s powerful computers, combined with navigational technologies such as the Global Positioning Satellite system and advanced collision-avoidance ...
Posted by Edward Willett at 11:19, May 27th, 2003 under Blog, Columns, Science Columns |
I like to write about the latest discoveries in cosmology and particle physics. But not all scientific research is focused on these frontiers. Some of it is aimed as close as--well, that spot of mustard on your pants.
Textile experts at Cornell University have
published a pamphlet with detailed, laboratory-tested instructions on how to remove almost 250 different types of stains.
Judy L. Price, a retired extension educator from Monroe County, N.Y., and Ann T. Lemley, professor and chair of textiles and apparel in the New York State College of Human Ecology at Cornell, worked together to update a 1975 Cornell publication called Removing Stains at Home.
A ...
Posted by Edward Willett at 16:10, November 24th, 2002 under Blog, Columns, Science Columns |
If you were fortunate enough to be able to spend last week in a climate-controlled environment, give thanks to Willis Haviland Carrier, whose new-fangled invention, air conditioning, first went into service 100 years ago, on July 17, 1902.
Modern air conditioning is an offshoot of an earlier invention, mechanical refrigeration, which is based on the fact that liquids absorb heat from their surroundings when they evaporate or boil. By controlling the liquid's pressure, you can control the temperature at which this happens: the lower the pressure, the lower the boiling point.
In both refrigerators and air conditioners, a compressor compresses a gas, which heats up as it is pressurized. Coils (on the back side of a ...
Posted by Edward Willett at 11:21, July 22nd, 2002 under Blog |
A unique construction project finally overcame delays and disaster last week to take shape in the Arctic. It looks more or less like an oil tank, but in fact it's a model of the kind of habitat humans may one day live in when they visit Mars.
The two-story fiberglass structure is the brainchild of The Mars Society, a private, not-for-profit organization whose goal is to encourage the exploration and settlement of Mars. And it's on Devon Island, Nunavut, for the simple reason that that remote, treeless island--part of the Queen Elizabeth Islands grouped between Baffin Bay and the Arctic Ocean--is about as close as Earth has to offer to a Martian environment....
Posted by Edward Willett at 11:23, August 1st, 2000 under Blog, Columns, Science Columns |
A report this week that air pollution, particularly ground-level ozone, is a more serious problem in Canada than previously thought got me to thinking about this stuff that we breathe. What is air? It's a question we don't ask very often, because we generally take air for granted.
Air is the mixture of gases comprising the atmosphere. Exactly what that mixture is, however, is harder to pin down, because while the concentration of some of the gases is nearly constant everywhere, others change from place to place and from time to time.
Most people, when they think of air, think of oxygen, which from our point of view is certainly ...
Posted by Edward Willett at 11:17, March 9th, 1999 under Blog, Columns, Science Columns |
Every year, on average, avalanches kill 10 people in Canada. In the past few days, two more people were added to this year's tragic toll as Michel Trudeau, son of former Prime Minister Pierre Trudeau, and Susanna Donald, a University of Calgary student from Regina, became the latest victims of these deadly snowslides, also known and feared as the "White Death."
The yearly toll has been increasing in the past few years as more and more people take to the backcountry in winter. Avalanches happen naturally--it's estimated there are a million of them a year throughout the world's mountain ranges--but in cases where the avalanches claim victims, 90 percent of the time, experts ...
Posted by Edward Willett at 17:05, November 16th, 1998 under Blog, Columns, Science Columns |
Most of the time, they're harmless. Innocuous, really. They tumble along, minding their own business, not hurting anybody. But every once in a while--BOOM!
"They" are asteroids, and when they go boom, it's because they've run into something. When that something is Earth...well, you've got trouble with a capital T, and that rhymes with E, and that stands for "extinction." Probably, 65 million years ago, of the dinosaurs; possibly, next time, of us.
Asteroids are rocky and/or metallic objects that orbit the Sun, just like the Earth does, but are too small to be considered planets. They're also known as "minor planets." They can be as small as a pebble ...
Posted by Edward Willett at 16:55, March 2nd, 1998 under Blog, Columns, Science Columns |
I've always been fascinated by the ocean: the endless rolling of the waves, the water's changing moods, the limitless horizon. Or maybe it's just because, coming from the dry prairies, I'm amazed that anything can be that big and wet.
How big and wet? The ocean covers 71 percent of the Earth's surface: 361 million square kilometres, and holds roughly 1.34 billion cubic kilometres of water.
Close to continents, it's relatively shallow, slowly sloping out, over a distance of many kilometres, to a depth of about 200 metres. This "continental shelf" gives way abruptly to the continental slope, which descends steeply to about 3500 metres; then there's an area called the continental rise, which slopes more ...
Posted by Edward Willett at 18:22, August 25th, 1997 under Blog, Columns, Science Columns |