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Running Time:
02:03:07
Celebrate the spring equinox at the Mayan ruins of Chichén Itzá, in the state of Yucatan, Mexico. The alignment of the sun on this day creates the appearance of a shadow, in the form of a serpent, that descends the main staircase of the great pyramid. The Live@Exploratorium crew is there to capture the snake on film and to speak with local archaeologists, archeoastronomers, and solar scientists about this amazing phenomenon.

Project: Ancient Observatories: Chichén Itzá | Browse All

Date: March 21, 2005
Format: Expedition
Category: History of Science
Subject(s): Astronomy/Space Science, General Science
Running Time:
00:03:07
If you’ve ever gone to hear an orchestra play, you know that the performance begins only after a session of tuning. An oft-repeated story tells of a visiting foreigner attending a concert in Paris. Afterwards, when asked which part of the performance he liked best, he replied, “The beginning, just before the man with the stick came in.” Tuning means adjusting the pitch of an instrument. The pitch of a sound depends on its frequency, the number of vibrations per second that produce the sound. For example, plucking a cello string might cause it to vibrate back and forth 200 times each second. You hear that sound as a low pitch of 200 cycles per second, or 200 hertz. An orchestra tunes itself to a very particular frequency, usually 440 hertz, a note known as A 440. The note is played by the oboist, and the rest of the orchestra tunes their instruments to match it. The oboe leads the tuning because of all the instruments, it is least affected by humidity or other weather conditions.

Project: Accidental Scientist: Science of Music | Browse All

Date: February 12, 2005
Format: Demonstration / Activity
Category: Popular Culture
Subject(s): Art, Physics, General Science
Running Time:
00:02:29
Music is more than meets the ears directly. Just as no sound exists in a vacuum, every space sculpts the sound within it. Like a site-specific equalizer, reflections, absorption, and resonances combine to give each venue a unique acoustic stamp. A subway tunnel is “live” space, rich with reverberations that trap and reflect sound in a well of hard tile. True to their name, “dead” spaces do nothing: The only sound heard is what travels directly from instrument to ear. An open field is the ultimate dead space. As you follow this wandering riff, listen to the changes wrought by environment. Distance is also a factor here—the sound you hear is recorded from the camera’s vantage. Which spaces sound live? Which sound dead? Do the acoustic changes affect the feeling of the music? Saxophonist Michael Pearce plays with the Highwater Blues Band in the San Francisco Bay Area.

Project: Accidental Scientist: Science of Music | Browse All

Date: February 12, 2005
Format: Interview
Category: Popular Culture
Subject(s): Art, Physics, General Science
Running Time:
1:00:11
Watch as the best teachers on the planet battle it out for the title of Iron Science Teacher. In this zany competition teachers will have ten minutes to create a science activity. This week's "secret" ingredient - Valentine gifts!

Project: Iron Science Teacher | Browse All

Date: February 11, 2005
Format: Demonstration / Activity
Category: Everyday Science
Subject(s): General Science
Running Time:
00:02:48
Stepping is rhythmic movement that uses the hands and feet as an instrument. Known best among African American fraternities and sororities, stepping draws on a long African tradition of using the body to make music. Synchronized movement and chants are coordinated by the leader, or step master. Sometimes improvising, always cultivating their own distinctive moves and rhythms, step teams reflect and reaffirm both the unity and the unique style of their group.

Project: Accidental Scientist: Science of Music | Browse All

Date: February 11, 2005
Format: Demonstration / Activity
Category: Popular Culture
Subject(s): Art, Physics, General Science
Running Time:
00:45:44
NASA's Mars Exploration Rovers, Spirit and Opportunity, have long outlived their life expectancy of three months. Join us as we sum up the rover data and explain how this information changes our view of Mars.

Project: Return to Mars | Browse All

Date: February 8, 2005
Format: Demonstration / Activity
Category: Science in Action
Subject(s): Astronomy/Space Science
Running Time:
00:46:28
After a week of analyzing the data from the Huygens probe, do scientists think of Titan differently? What were the unexpected findings? Which hypotheses were wrong? Which were correct? Join us as we talk to mission scientists at NASA's Jet Propulsion Laboratory and get the latest on this enigmatic moon.

Project: Saturn: Jewel of the Solar System | Browse All

Date: January 22, 2005
Format: Demonstration / Activity
Category: Science in Action
Subject(s): Astronomy/Space Science
Running Time:
00:31:54
After yesterday's historic mission to the surface of Titan, what happens next? What do the new pictures of Saturn's largest moon tell us, and what does it mean for our understanding of earth?

Project: Saturn: Jewel of the Solar System | Browse All

Date: January 15, 2005
Format: Demonstration / Activity
Category: Science in Action
Subject(s): Astronomy/Space Science
Running Time:
00:28:55
After its long journey to Saturn's largest moon, Titan, the Huygens probe is released from the Cassini spacecraft. The Huygens probe completes its descent to Titan, capturing hundreds of images on its way. Join Senior Scientist Paul Doherty as he gives us background on this incredible mission and sets the stage for the first close-up images of this mysterious moon.

Project: Saturn: Jewel of the Solar System | Browse All

Date: January 14, 2005
Format: Demonstration / Activity
Category: Science in Action
Subject(s): Astronomy/Space Science
Running Time:
12:26:40
Join Senior Scientist Paul Doherty as we receive the first images of Titan, Jupiter's largest moon, from the European Space Agency headquarters in Darmstadt, Germany. The Huygens probe, released from the Cassini spacecraft, descended to Titan and captured hundreds of images of this mysterious moon.

Project: Saturn: Jewel of the Solar System | Browse All

Date: January 14, 2005
Format: Interview
Category: Science in Action
Subject(s): Astronomy/Space Science