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Exploratorium composer Wayne Grim used the video of the transit to create a sound composition in real time. As the video signal was received by Wayne's computer, a program he wrote converted the signal into a unique aural experience. http://www.waynegrim.com

Watch the beginning of Venus’s transit across the disk of the sun, one of the rarest astronomical events.

Watch the conclusion of Venus’s 6.5-hour journey across the disk of the sun, one of the rarest astronomical events.

Join Dr. Russell Schnell, the director of the Global Monitoring Division of the National Oceanic and Atmospheric Administration (NOAA), as he talks about what it takes to monitor climate change.

Learn about NOAA’s Mauna Loa Observatory on the Big Island of Hawaii, the location of the Exploratorium’s June 5, 2012, webcast of the transit of Venus. A leading atmospheric research facility, the observatory has been collecting and monitoring data relating to atmospheric change since the 1950s. Dr John Barnes, the Station Chief for the observatory, describes the functions of the MLO, which provides valuable long-term and continuous recording of data.

Dr. John Barnes, Station Manager of NOAA's Mauna Loa Observatory, shares the history of Charles Keeling's pioneering carbon dioxide measurements, which have been taken continually at Mauna Loa since 1958.

Senior Exploratorium Scientist, Paul Doherty demonstrates how you can make your own sun viewer. You can safely view sunspots, eclipses and transits with this equipment that you may have laying around the house! To learn more about the upcoming Transit of Venus visit: http://www.exploratorium.edu/venus/question3.html

As a special event in conjunction with the 2009 American Geophysical Union Fall Meeting, we connected a live audience at the Exploratorium with scientists at the South Pole. Learn about atmospheric research at the South Pole from NOAA's Nick Morgan, the IceCube neutrino detector from Mark Krasberg and Laura Gladstone, and the South Pole Telescope from Bill Holzapfel.

Meet Dr. Ethan Brodsky from the U. of Wisconsin, who advised a group of undergraduate students in the design and build of an electric snowmobile. Video produced by Ice Stories correspondent Zoe Courville.

At the National Ice Core Lab in Denver, Colorado, scientists study ice cores in a Class 100 clean room lab kept at minus 7 degrees F.