Modern-day scientists, retracing the path of Joseph
Grinnell in Yosemite National Park, document conspicuous changes in
the natural world and find a culprit unimagined by biologists 100
years ago: global warming.
Also in this
issue: On his 12th attempt, Rep. Richard Pombo, R-Calif.,
succeeds in pushing a bill through the U.S. House designed to
reform the Endangered Species Act and end critical habitat
protection.
