Science

He invented the Segway Human Transporter, a high-tech scooter. The scooter relies on sensors, sold-state gyroscopes and software to produce a balanced ride even over rough terrain. Kamen's other inventions include a portable drug-infusion pump, a compact dialysis machine and a wheelchair that can climb stairs. Kamen heads DEKA Research and Development Corporation in New Hampshire.

Retired U.S. Navy flight surgeon and NASA astronaut Captain Jerry Linenger talks about the awe and peril of space travel. He spent five months on the Russian Space station Mir and wrote about the account in his book, Off the Planet: Surviving Five Perilous Months Aboard the Space Station Mir." He described the Mir as "six school buses all hooked together." During his time there, he says, he and fellow crew members had numerous brushes with death, lacked adequate supplies and battled constant system failures.

Scientist and conservationist Dr. Alan Rabinowitz. He’s been called the “Indiana Jones” of wildlife science. He is Director of the Science and Exploration Program at the Wildlife Conservation Society, based at the Bronx Zoo in New York. In 1985 his research in Belize resulted in the world’s first jaguar sanctuary. Since then he has spearheaded the preservation of vast tracts of wilderness land around the globe. The survival of the Jaguar is now in jeopardy.

In her new guide to the evolutionary biology of sex, Judson explores the sex lives of animals and insects. Posing as Dr. Tatiana, sex-advice columnist, she answers "letters" posted by such creatures as the fairy wren, the stalk-eyed fly and the African elephant. Her new book is Dr. Tatiana's Sex Advice to All Creation. Judson has also written for The Economist, Nature and Science. This interview first aired Aug. 13, 2002.

She's put together a book of photographs of and from the museum's collection of human oddities and outdated medical models. The Mutter Museum is in Philadelphia, Pa., and is one of the last medical museums from the 19th century. It originated with the collection of Dr. Thomas Dent Mutter, who gathered unique specimens for teaching purposes. The museum displays many strange human artifacts, such as a slice of a face, amputated limbs and a plaster cast of the conjoined twins Chang and Eng Bunker.

Phil Patton, author of Bug: The Strange Mutations of the World's Most Famous Automobile. It's a cultural history of the Volkswagen Beetle, the most produced and best-known car of all time. Patton writes for The New York Times, Esquire, Wired and ID. He also wrote Dreamland: Travels inside the Secret World of Roswell and Area 51.

Aerospace consultant Nick Cook, author of the new book, The Hunt for Zero Point: Inside the Classified World of Antigravity Technology. (Broadway Books/ Random House) In the book, Cook tracks down the secret history of anti-gravity research. It*s technology that defies the laws of physics. Cook discovered that during WWII, the Nazis claimed to have been close to antigravity technology. The U.S. government allegedly conducted antigravity research in the 1950s and 60s. Cook is former Aviation Editor for the military affairs journal, Jane's Defense Weekly.

Brazilian physicist Marcelo Gleiser is the author of the new book, The Prophet and the Astronomer: A Scientific Journey to the End of Time (WW Norton). In it he explores our relationship to the sky and how it has influenced religion and then in turn - science. He writes, 'one of my goals. . is to humanize science, to argue that our scientific ideas are very much a product of the cultural and emotional environment where they originate'. Gleiser is Professor of Natural Philosophy and professor of physics and astronomy at Dartmouth College.

Journalist Jon Cohen writes for Science Magazine. He just got back from the 14th International AIDS conference where he reported on the AIDS vaccine and anti-HIV drug therapies. His article "Designer Bugs" in the July/August edition of The Atlantic Monthly is about how scientists have the ability to create synthetic viruses in the lab, like mousepox and polio, and the controversies and dangers this presents.

Columnist Robert Wolke writes Food 101 for The Washington Post, a syndicated column that won the James Beard Foundation Award for best newspaper column. He's the author of the new book What Einstein Told His Cook: Kitchen Science Explained. Wolke is also professor emeritus of chemistry at the University of Pittsburgh.