Science

Climatologist Stephen Schneider. His new book, "Global Warming: Are We Entering the Greenhouse Century," examines the causes of global warming and warns about the possible impact of this "greenhouse effect." It also outlines what individuals and governments can do to slow down the impact of these trends.

Physicist James Trefil. His writings have been praised for bringing the complexities of modern science to the general reader. One of his best-known books, Meditations At Sunset, won wide praise for his ability to explain the wonders of the physical world in ways the layman can comprehend. His other books include The Moment of Creation and Meditations at 10,000 Feet. His latest book, Reading The Mind of God, explores the sequence of events that led to the discovery of universality - the principle that the laws of nature on earth apply throughout the universe.

Bill Joy. He's a founder and Vice President of Research and Development for Sun Microsystems, one of the most innovative and successful computer companies. He imagines the computer of 14 years from now, a machine he calls the "2001 computer." It will be a phenomenally fast machine (128,000 times the speed of current computers), with a memory capacity the equivalent of 300,000 books, all fitting into the size of a sugar cube. (Interview with Sedge Thomson)

Astronomer and science writer Timothy Ferris. His most recent book, Coming of Age in the Milky Way, is the story of how man discovered his place in the cosmos. The book was a surprise bestseller last year and was nominated for a Pulitzer Prize. Critics hailed the book as a literary and scientific breakthrough that reads both as intellectual history and an adventure story. Ferris' first book, The Red Limit, was similarly praised for creating a new style of science book that combines the force of fact and detail with the grace of fiction writing.

Marine botanist Sylvia Earle. She's been described as one of the most intrepid divers in the history of underwater exploration. She's swum with humpback whales, explored the kelp forests off the coast of California, and dove into the trenches off the coasts of Hawaii where she once went to depths of 1,250 feet, which at the time was the deepest any human had dove without a connection to the surface.

Paleontologist Jack Horner discovered some of the most significant fossil records of dinosaurs, which suggest that the animals cared for their young and traveled in herds.

Science writer Dougal Dixon's new book speculates on what dinosaurs would have evolved into had they not gone extinct.

Science writer James Gleick's new book is about chaos theory, which informs all scientific disciplines. This concept can sometimes be difficult to understand; Gleick says that the unpredictability of the weather serves as an excellent example.

Journalist Timothy Ferris spent twelve years writing his new history of the galaxy. He explores ancient and contemporary theories of the universe, and how philosophy and theology have influenced scientific advancements.

Alan Beck, a leading authority on the relationships between pets and their owners. Beck is the director of the Center for Interaction of Animals and Society at the University of Pennsylvania's School of Veterinary Medicine. (Interview by Marty Moss-Coane)