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0:58:28
The Exploratorium's Senior Scientist Tom Humphrey takes you around the Antiproton Decelerator, from beam pipes to antihydrogen traps.

1:09:59
Follow CERN's Mission Impossible team as they race against the clock to collect all they need to bring antihydrogen back to CERN's webcast headquarters.

0:41:28
Scientists at CERN in Switzerland explain to the Exploratorium's San Francisco audience why preparing for antimatter experiments is like arranging a marriage.

0:43:07
Making antihydrogen is no easy matter. Researchers at CERN show the Exploratorium's Melissa Alexander and Tom Humphrey where positrons live and how they keep them as cold as deep space.

0:29:09
What is antimatter and why are scientists studying it? How is the world's largest particle accelerator constructed? The Exploratorium's Rob Semper talks about how science is done at CERN and answers questions about antimatter from the Exploratorium's Webcast audience.

0:29:52
A behind-the-scenes look at how the world's only antimatter factory works, complete with live footage from CERN and a virtual reality tour of the antimatter decelerator. In this Webcast, Rob Semper and Ron Hipschman talk with Melissa Alexander and Thomas Humphrey, who join them virtually from Switzerland.

1:03:23
On May 13, 2000, we peeked under the wrappings of an Egyptian mummy from the Fine Arts Museums of San Francisco. A live video link connected us to the imaging center at UC San Francisco. Radiologist Dr. Henry Goldberg and Fine Arts museum conservator Lesley Bone guided us through the CT scan and helped to interpret the findings.

0:01:01
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.

0:01:01
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.