Latest from evolution
January 01, 2008 by Kathleen M. Wong
Ask most people to name the most important species of our grassland habitats, and they’ll probably pick coyotes, golden eagles, or even rattlesnakes. But experts say that the strongest contender of all is the animal eaten by all those other ones: the lowly California ground squirrel, a true keystone of local grasslands. Belowground, the squirrels’ lengthy burrows harbor insects, snakes, owls, and even frogs and salamanders that couldn’t live in such a dry landscape without the squirrels’ help. And above-ground, they’ve evolved some unusual defenses that allow them to thrive, even as they feed so many others.
October 01, 2007 by David Carroll
Neptune’s Ark: From Ichthyosaurs to Orcas, by David Rains Wallace, UC Press, 2007, 313 pages, $27.50
The thin continental …
January 01, 2007 by Gary Brand
Walk patiently along a few ocean beaches in the Bay Area, and you just might find objects of stunning beauty that also provide clues to a lost world, fossil sand dollars that are as much as 2 million years old. These fossils, not shells but skeletons called tests, show up only near Daly City and Point Reyes, so it’s a privilege to find intact specimens that have survived the rigors of the coast for many centuries.