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00:10:19
Join the Exploratorium's Dr. Paul Doherty as he visits a "sculpture to observe the stars" in northern New Mexico, where the Sangre de Cristo Mountains meet the eastern plains. There artist Charles Ross is creating an art installation that is also a star observatory. This major earthwork has two main elements: the Star Tunnel, which allows you to walk through the entire history of the earth's changing alignment to our North Star, Polaris; and the Solar Pyramid, where one can visually experience an hour of the earth's rotation.

00:18:34
Dr. Carol Greider is a professor of molecular biology and genetics at Johns Hopkins University. She worked with molecular biologist Elizabeth Blackburn to discover the role of telomeres—segments of DNA that protect and stabilize the ends of chromosomes. Dr. Greider tells us about her work and shares her thoughts about the importance of mentors for women in science.

00:26:05
Dr. Bruce Stillman is the Director of Cold Spring Harbor Laboratory, a position he inherited from James Watson in 1994. He continues his own research at the lab on DNA replication. In this program, Dr. Stillman describes the unique culture of science at CSHL, explores future directions of research, and tells us what he learned as an administrator for Dr. Watson.

00:25:57
Dr. Walter Gilbert, a physicist who turned to molecular biology in 1960, won the Nobel prize in chemistry in 1980 for determining the base sequences of DNA. His recent research has concentrated on the structure of genes and the evolution of DNA sequences. In this Webcast, Dr Gilbert tells us how physicists have helped drive discoveries in molecular biology, and the relationship between private and university research efforts.

00:24:51
Dr. Sydney Brenner won the Nobel prize in physiology or medicine in 2002 for his work with the tiny nematode, C. elegans. Dr. Brenner recruited the one-millimeter worm in the early sixties as the ideal model organism to study cell differentiation and organ development. In this program, he describes how new model organisms are established for studying basic physiology, recounts his reaction to seeing Watson and Crick's DNA model for the first time, and offers advice to young scientists just starting out.

0:56:50
Find out how yeast performs its biochemical transformation of a bit of flour and water into crusty, delicious bread. Explore the history of breadmaking around the world, and learn how bread has come to occupy such a central place in the cuisines of many nations. We'll bake some bread in our studio kitchen, play with yeast and glutens in our lab, and share recipes.

00:29:21
Look behind the scenes into the process of scientific research and the people who do it - in the tropical Central American country of Belize. In this series of Webcasts, we visited a field research station located in the remote Chiquibul forests of the mountains of Belize. See why science in the remote jungle of the Chaquibul forest of Belize can feel like an adventure movie.

00:29:42
Look behind the scenes into the process of scientific research and the people who do it - in the tropical Central American country of Belize. In this series of Webcasts, we visited a field research station located in the remote Chiquibul forests of the mountains of Belize. See why science in the remote jungle of the Chaquibul forest of Belize can feel like an adventure movie.

00:32:12
Exploratorium staff Ron Hipschman and Robyn Higdon sum up the last five days of spacewalks, and show a couple of good-bye conferences with the shuttle astronauts.

00:39:14
The Near Infrared Camera and Multi-Object Spectrometer (NICMOS) will be brought back to life with the installation of the new experimental NICMOS cryo-cooler. The cryo-cooler updates the technology from that of an icebox to a modern refrigerator. We also talk to Keith Noll, head if the Hubble Heritage Project, which is responsible for bringing us those stunning pictures from deep space.