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This radio broadcast explains how the North Pole is constantly moving due to the rotation of the Earth, which in turn is determined by any changes in the mass distribution of the Earth. The clip is 2 minutes in length. Full description.
Grade level: General public
Resource type: Radio broadcast
Subject: Geophysics
 
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Mars certainly does not support life now, but did it once? This radio broadcast introduces the work of a NASA exobiologist who is planning to look for ancient fossils on Mars, including stromatolites left behind by microbes. The clip is 2 minutes in length. Full description.
Grade level: General public
Resource type: Radio broadcast
Subject: Paleontology, Space science
 
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At the bottom of the ocean, miles away from the nearest sunlight, live all sorts of bizarre organisms around submarine volcanoes - new types of bacteria and giant tubeworms, for example. This radio broadcast reports on these lifeforms and their ecosystems, which are changing what scientists think about the origin of life on Earth. The clip is 2 minutes in length. Full description.
Grade level: General public
Resource type: Radio broadcast
Subject: Biological oceanography
 
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If the extinction of the dinosaurs was caused by a gigantic meteor that hit the earth 65 million years ago, as many scientists believe, then there should be traces of meteor dust in the geological record. This radio broadcast reports on a group of oceanographers who are drilling into the ocean floor to look for that meteor dust. The clip is 2 minutes in length. Full description.
Grade level: General public
Resource type: Radio broadcast
Subject: Geology, Paleontology
 
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To successfully model the climate, scientists need to know - among many things - how much ice there is at the poles. This radio broadcast reports on a new technique to measure the thickness of the ice by listening to it cracking and creaking. The clip is 2 minutes in length. Full description.
Grade level: General public
Resource type: Radio broadcast
Subject: Climatology, Cryology
 
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Becoming a fossil is not easy. Most shells or bones decompose or get eaten. This radio broadcast describes how a group of scientists are dropping bags of potential fossils in the ocean to see just what it takes to turn them into stone. The clip is 2 minutes in length. Full description.
Grade level: General public
Resource type: Radio broadcast
Subject: Paleontology
 
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400 million years ago, in the early Devonian era, over half of all the creatures in the ocean were suddenly killed. This radio broadcast explains how millenia later, one scientist has finally found the possible culprit: trees and plants that evolved to produce soil excessive in nutrients. This soil washed into the sea, producing algae plumes and ultimately, low oxygen conditions that killed many marine ... Full description.
Grade level: General public
Resource type: Radio broadcast
Subject: Paleontology
 
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Most earthquakes occur in the top 100 miles of the crust of the Earth, but some happen far below that, where the earth is so hot that rocks should simply flow past each other instead of producing the jolts that cause earthquakes. So what causes them? This radio broadcast explains how one geophysicist has performed experiments revealing that rock squeezed under intense pressure contains bits that become ... Full description.
Grade level: General public
Resource type: Radio broadcast
Subject: Geophysics, Natural hazards
 
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Dunes in the desert can make awesome noises like the sounds of faraway drums and marching armies. Scientists are studying what properties of the sand cause these booms. The clip is 2 minutes in length. Full description.
Grade level: General public
Resource type: Radio broadcast
Subject: Physical geography
 
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Mountains look solid, but actually they flow like molasses under their own weight, according to a new study. This radio broadcast introduces research into the forces on mountains, and how they can best be explained by mountains flowing like a liquid. The study is changing the way scientists think about how the American landscape was formed. The clip is 2 minutes in length. Full description.
Grade level: General public
Resource type: Radio broadcast
Subject: Physical geography, Geology
 
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Results 21 - 30 of 117 <<  1 2 3 4 5 6 7  >>