Relativity and the Global Positioning System

An ideal companion to "The Universe in a Nutshell" is this article by Neil Ashby, a Professor of Physics at University of Colorado - Boulder. Hand- held GPS devices have become standard equipment for boaters, hikers, and technology junkies. It is now taken for granted that one's position on the earth can be obtained within a few seconds, accurately, and free.

The Universe in a Nutshell

I was amazed at the popularity of Hawking's "A Brief History of Time" in 1998. Not because it was not a great book, but because the average reader's background in relativity, quantum mechanics, and cosmology is limited to their discussion in Star Trek.

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

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.

Secret Knowledge: Rediscovering the Lost Techniques of the Old Masters

I first wrote about the controversial thesis of this book back in January of 2000, when my "Pick" was an article about David Hockney by Lawrence Wechler in the New Yorker. With the publication of this very attractive, large-format book, you can look for yourself at the evidence that he argues shows that many of the great master painters secretly used optical devices to help produce their work.

Ice Memory

Ice cores, bored through thousands of feet of stable glacial ice in Greenland, have proved to be our best record of global climate over more than a hundred thousand years.