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Hal Harris's picture

Vacuum Bazookas, Electric Rainbow Jelly, and 27 Other Saturday Science Projects

Fri, 03/01/2002 - 00:00 -- Hal Harris

Those of us who were fans of the old "Amateur Scientist" column of Scientific American will enjoy this collection of projects that look to be fun to build and to play with. These are all things that the author has invented or adapted for a Saturday Science Club for kids near his home in Guildford, UK.

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Nine Crazy Ideas in Science: A Few of Them Might Even be True

Sat, 12/01/2001 - 00:00 -- Hal Harris

One of the goals of a course I teach in our Honors College is to provide non-science majors with the tools they need to differentiate authentic science from material that has merely been provided a "scientific" dressing. Physicist Robert Ehrlich has provided nine case studies that are ideal for this purpose. Do more guns in the hands of citizens decrease crime? Is AIDS really caused by HIV?

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Off the Planet: Surviving Five Perilous Months Aboard the Space Station Mir

Wed, 05/02/2001 - 02:00 -- Hal Harris

The word "Surviving" should probably be underlined in the title of this first-hand account by an American astro/cosmonaut of his experiences aboard Mir. There is precious little science in this book, but a great deal about living at the mercy of technology and Russian bureaucracy.

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The Shaken-Soda Syndrome

Tue, 05/01/2001 - 01:00 -- Hal Harris

Try this! Take two identical cans of soda (or some other beverage). Roll then down a slight incline to confirm that they roll at about the same speed. What do you think will happen if you shake up one can and roll them again? Make a prediction. Then try it. Have your students do it. Develop hypotheses and test them. This is a terrific experiment that anyone can do.

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The Physics of Gridlock

Fri, 12/01/2000 - 00:00 -- Hal Harris

How is automobile traffic like a gas? No, it's not because the collisions are inelastic. Researchers in chaos theory, especially Dirk Helbing and Boris Kerner, both theoretical physicists, have been working on traffic flow, using models similar to those of particle dynamics.

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Exploring the Art and Science of Stopping Time: The Life and Work of Harold E. Edgerton

Thu, 06/01/2000 - 01:00 -- Hal Harris

This is the first time that something not printed on paper has been chosen for Hal's Picks, and it probably will not happen often in the future. This particular subject is, however, better treated in digital format than in a book (although several good books on Edgerton and his work are also available).

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Sport: Extreme Stargazing

Wed, 03/01/2000 - 00:00 -- Hal Harris

For anyone who has tried unsuccessfully (like me) to find familiar stars in well-known constellations through a telescope, the competition that David Freedman describes sounds impossible. The "sport" is to see how many of the 110 celestial objects in the Messier catalog you can locate and identify during a single night of observation.


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