A New Theory of Glacial Cycles

Much of this work has been done in collaboration with Gordon MacDonald.

Read a quick summary

If you have a fast connection, you can view a movie of the orbits of the inner planets for the past 3 Myr.

There have been several popular articles about our work, including:

San Francisco Chronicle news article, by science journalist Charles Petit, appeared on Jan. 16, 1996.

A long article about our ice age work (and other things), written by Robert Hurwitt (the Drama Critic for the SF Examiner) appeared in the July 19 East Bay Express.

An update of the status of the theory, and the reactions of others, in the October 4, 1997 issue of Science News. You can read selected excerpts from this article.

If you would like to see what the glaciers look like today, you can view of photo of the Greenland glaciers taken by Rich.