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JCE ChemEd Xchange provides a place for sharing information and opinions. Currently, articles, blogs and reading lists from ChemEd X contributors are listed below. We plan to include other items that the community wishes to share through their contributions to ChemEd X.

Hal Harris's picture

Impact Event at the Permian-Triassic Boundary: Evidence from Extraterrestrial Noble Gases in Fullerenes

Thu, 03/01/2001 - 00:00 -- Hal Harris

It has been twenty years since Luis Alvarez suggested that the dinosaurs were extinguished by a meteor impact that killed much of the life on earth. His evidence was in a thin layer of iridium-rich soil that corresponded with the extinction, and the fact that iridium is much more abundant in some meteors than it is on earth.

Hal Harris's picture

Hidden Evidence: Forty true crimes and how forensic science helped solve them

Fri, 02/02/2001 - 01:00 -- Hal Harris

Even readers who already know something about forensic science are likely to learn from "Hidden Evidence" about historic cases that have been solved by science. Unfortunately, there are so few details provided in the book that the most interesting questions often remain unanswered.

Hal Harris's picture

The Lying Stones of Marrakech: Penultimte Reflections on Natural History

Tue, 01/02/2001 - 01:00 -- Hal Harris

I find it surprising that this is the first book by Stephen Jay Gould to have been selected as a "Hal's Pick", since I own and have enjoyed reading many of them. I have had the pleasure of meeting and hearing Professor Gould speak several times and I wish I could write as well as he speaks extemporaneously.

Hal Harris's picture

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.

Hal Harris's picture

A Friend of the Earth

Thu, 11/02/2000 - 01:00 -- Hal Harris

"A Friend of the Earth" is a novel that alternates in time between the near-present and about twenty-five years in the future, when the worst nightmares of the environmental movement have come to pass. Global warming has turned Southern California into a terrible place to live; violent storms alternate with 130 degree days.

Hal Harris's picture

Report of the National Commission on Mathematics and Science Teaching for the 21st Century (Glenn Commission Report)

Sun, 10/01/2000 - 01:00 -- Hal Harris

This report is potentially very important. On the other hand, it could have no impact whatsoever. If Washington reads the Commission findings and recommendations, and funds the five billion dollar programs it recommends, science and mathematics education in the United States could get the "shot in the arm" that it so desperately requires. "A Nation at Risk" was published in 1983.

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