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0:02:02
On November 15th, 1999, for the first time in 25 years, the planet Mercury passed between us (in the western hemisphere) and the sun--an event known as a "transit." Here is one of five short streaming videos detailing the event.

0:02:02
On November 15th, 1999, for the first time in 25 years, the planet Mercury passed between us (in the western hemisphere) and the sun--an event known as a "transit." Here is one of five short streaming videos detailing the event.

2:00:05
On August 11, 1999, 3:00 a.m. Pacific Standard Time, the Exploratorium presented a live Webcast of a total solar eclipse that passed across Europe and Asia. The program included direct satellite communication with our expedition team, reporting from a crowded square in Amasya, Turkey, a town along the path of totality.

1:08:44
U.C. Berkeley Professor of Psychology Dr. Arthur Shimamura will discuss what we know about the effects of aging on human memory and its relation to Alzheimer's Disease. Find out how the brain stores and retrieves information, and learn new techniques that may help improve your memory.

1:55:23
Exploratorium Senior Scientist Mary Miller presents audio dispatches from the "Review of the Causes and Consequences of Cold Events: A La Nina Summit" held in Boulder, Colorado. The workshop was presented by The United Nations University, The National Center for Atmospheric Research, and the United Nations Environment Program.

1:12:19
Exploratorium Senior Science Writer Mary Miller presents audio dispatches and selected lectures from the "Review of the Causes and Consequences of Cold Events: A La Nia Summit" held in Boulder, Colorado. The workshop was presented by The United Nations University, The National Center for Atmospheric Research, and the United Nations Environement Program.

1:16:36
Exploratorium Senior Science Writer Mary Miller presents audio dispatches and selected lectures from the "Review of the Causes and Consequences of Cold Events: A La Nina Summit" held in Boulder, Colorado. The workshop was presented by The United Nations University, The National Center for Atmospheric Research, and the United Nations Environment Program.

0:51:43
Exploratorium Senior Science Writer Mary Miller presents audio dispatches and selected lectures from the "Review of the Causes and Consequences of Cold Events: A La Nina Summit" held in Boulder, Colorado. The workshop was presented by The United Nations University, The National Center for Atmospheric Research, and the United Nations Environment Program.

0:45:08
Exploratorium Senior Science Writer Mary Miller presents audio dispatches and selected lectures from the "Review of the Causes and Consequences of Cold Events: A La Nina Summit" held in Boulder, Colorado. The workshop was presented by The United Nations University, The National Center for Atmospheric Research, and the United Nations Environment Program.

0:50:59
Exploratorium Senior Science Writer Mary Miller presents audio dispatches and selected lectures from the "Review of the Causes and Consequences of Cold Events: A La Nina Summit" held in Boulder, Colorado. The workshop was presented by The United Nations University, The National Center for Atmospheric Research, and the United Nations Environment Program.