Browsing 200 - 210 results of 371 programs for subject - General Science


Ice Stories:  Clockwise (Clip)
Running Time:
00:00:55
Why do the hands on clocks go "clockwise?" Seems like a circular definition, but if you looked closely at sundials in the northern hemisphere, you'd notice that the shadow of the sun moves around the sundial in a "clockwise" direction. This was adopted by clock-makers and became the standard we know today. In the southern hemisphere, the sun's shadow moves around the dial in the opposite direction, so if clocks had been invented there, our watches would move the other way.

Project: Ice Stories: Dispatches from Polar Scientists | Browse All

Date: January 12, 2009
Format: Expedition
Category: Science in Action
Subject(s): Astronomy/Space Science, General Science

Keywords: sun, astronomy

Links: Dispatch: Clockwise

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Ice Stories:  Visit to Shackleton's Hut (Webcast)
Running Time:
00:49:29
Our intrepid Exploratorium team shares experiences from their visit to Shackleton's hut. This hut is at Cape Royds, where Shackleton mounted an expedition to the South Pole and made a first ascent of Mt. Erebus.

Project: Ice Stories: Dispatches from Polar Scientists | Browse All

Date: December 28, 2008
Format: Expedition
Category: Science in Action
Subject(s): General Science, History

Keywords: historic, discovery, hut, mcmurdo, exploration


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Ice Stories:  Antarctic Photography (Webcast)
Running Time:
00:38:04
We talk to photographer John Weller, who spent the austral summer 2008 scuba diving under the ice in Antarctica.

Project: Ice Stories: Dispatches from Polar Scientists | Browse All

Date: December 21, 2008
Format: Expedition
Category: Science in Action
Subject(s): Art, General Science

Keywords: photography, scuba, ocean, underwater, weller, antarctica, ice

Links: 

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Ice Stories:  Static Scarf (Clip)
Running Time:
00:00:28
The air is so dry here at McMurdo that anything that gets charged, stays charged. Moist air quickly discharges objects because the water in the air picks up charge from an object and quickly flies away, taking charges with it. This does not happen here. We are constantly getting shocks from our clothing, our bedding and when we exit vehicles.

Project: Ice Stories: Dispatches from Polar Scientists | Browse All

Date: December 11, 2008
Format: Expedition
Category: Science in Action
Subject(s): General Science, Physics

Keywords: static, electricity

Links: Dispatch: Static Scarf

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Evidence:  Who Is (Clip)
Running Time:
00:03:07
Geneticist Mark Stoneking discusses a special type of genetic material called mitochondrial DNA gets passed directly from mother to child. Largely unchanged from generation to generation, this genetic material gives researchers a way to track populations back in time.

Project: Evidence: How Do We Know What We Know? | Browse All

Date: November 11, 2008
Format: Interview
Category: Popular Science
Subject(s): Life Science/Biology, General Science

Keywords: mitochondrial dna

Links: Transcript (in English)
Transcript (en Espanol)

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Evidence:  Learning from Neanderthal DNA (Clip)
Running Time:
00:01:30
Evolutionary geneticist Ed Green discusses the key questions researchers hope to answer by analyzing the Neanderthal genome.

Project: Evidence: How Do We Know What We Know? | Browse All

Date: November 11, 2008
Format: Interview
Category: Popular Science
Subject(s): General Science, Life Science/Biology

Keywords: neanderthal genome

Links: Transcript (in English)
Transcript (en Espanol)

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Evidence:  What Can We Learn from a Tooth? (Clip)
Running Time:
00:00:59
Anthropologist Tanya Smith explains that invisible microstructure inside teeth creates a durable record of life history, including events such as birth, illness, famine, stress, and death.

Project: Evidence: How Do We Know What We Know? | Browse All

Date: November 11, 2008
Format: Interview
Category: Popular Science
Subject(s): Life Science/Biology, General Science

Keywords: teeth

Links: Transcript (in English)
Transcript (en Espanol)

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Evidence:  How Do Bones and Teeth Grow? (Clip)
Running Time:
00:01:53
Anthropologist Jean-Jacques Hublin explains that unlike teeth, bones undergo a lifelong process called remodeling, in which they are constantly being destroyed and recreated.

Project: Evidence: How Do We Know What We Know? | Browse All

Date: November 11, 2008
Format: Interview
Category: Popular Science
Subject(s): Life Science/Biology, General Science

Keywords:

Links: Transcript (in English)
Transcript (en Espanol)

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Evidence:  Virtual Skull Reconstruction (Clip)
Running Time:
00:02:25
Anthropologist Philipp Gunz explains the process of virtual fossil reconstruction, a technique that can reverse the damage done to fossils by time and the elements.

Project: Evidence: How Do We Know What We Know? | Browse All

Date: November 11, 2008
Format: Interview
Category: Popular Science
Subject(s): Life Science/Biology, General Science

Keywords: fossil, fossil reconstruction

Links: Transcript (in English)
Transcript (en Espanol)

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Evidence:  Why Are Fossils So Rare? (Clip)
Running Time:
00:00:57
Anthropologist Katerina Harvati explains the rare convergence of circumstances that are necessary for the discovery of a fossil specimen.

Project: Evidence: How Do We Know What We Know? | Browse All

Date: November 11, 2008
Format: Interview
Category: Popular Science
Subject(s): Life Science/Biology, General Science

Keywords:

Links: Transcript (in English)
Transcript (en Espanol)

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Webcasts made possible through the generosity of the Gordon and Betty Moore Foundation, The Jim Clark Endowment for Internet Education, the McBean Family Foundation,.and the Corporation for Educational Networks Initiatives in California (CENIC).

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