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  • Kansas Legislator Proposes Bill to Outlaw Sustainability Education
    A bill has been introduced in the Kansas legislature this week that would prohibit the promotion of ...Read more

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    Kansas Legislator Proposes Bill to Outlaw Sustainability Education

    A bill has been introduced in the Kansas legislature this week that would prohibit the promotion of sustainability. Here is a link to the one-page bill: http://www.kslegislature.org/li/b2013_14/measures/documents/hb2366_00_0000.pdf. See report on Bloomberg News.
  • Earth's Center Is 1,000 Degrees Hotter Than Previously Thought, Synchrotron X-Ray Experiment Shows
    Scientists have determined the temperature near the Earth’s center to be 6000 degrees Celsius, 1000 ...Read more

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    Earth's Center Is 1,000 Degrees Hotter Than Previously Thought, Synchrotron X-Ray Experiment Shows

    Scientists have determined the temperature near the Earth’s center to be 6000 degrees Celsius, 1000 degrees hotter than in a previous experiment run 20 years ago. These measurements confirm geophysical models that the temperature difference between the solid core and the mantle above, must be at least 1500 degrees to explain why the Earth has a magnetic field. For more information about this study, see the press release from the European Synchrotron Radiation Facility.
  • Ocean Volcanic Rocks Contain Samples of Recycled Crust
    Scientists have long believed that lava erupted from certain oceanic volcanoes contains materials fr...Read more

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    Ocean Volcanic Rocks Contain Samples of Recycled Crust

    Scientists have long believed that lava erupted from certain oceanic volcanoes contains materials from the early Earth’s crust. But decisive evidence for this phenomenon has proven elusive. New research from a team including Carnegie’s Erik Hauri demonstrates that oceanic volcanic rocks contain samples of recycled crust dating back to the Archean era 2.5 billion years ago. Their work is published in Nature. Oceanic crust sinks into the Earth’s mantle at so-called subduction zones, where two plates come together. Much of what happens to the crust during this journey is unknown. Model-dependent studies for how long subducted material can exist in the mantle are uncertain and evidence of very old crust returning to Earth’s surface via upwellings of magma has not been found until now. For more information about these results, see the press release from the Carnegie Institution.
Did a Leonid meteor crash into the Moon, leaving a crater like this one?
Click on image for full size
Courtesy of NASA

Highlights of the Leonid Meteor Shower
News story originally written on November 23, 1999

The Leonids have come and gone, but scientists are still studying this exciting meteor shower. One astronomer believes that he has videotaped a meteorite impacting the Moon! David Dunham, president of the International Occultation Timing Association, is looking for others that may have proof of this rare event.

Viewers in Europe and and parts of the Middle East saw the best show on November 18, 1999. Scientists estimate an average of 70 meteors an hour. Those living in North America had a small but respectable average of 20 to 40 an hour. Needless to say, all those that woke up before dawn received a special treat.

But not all scientists were looking through their telescopes. NASA launched a weather balloon shortly after the shower's peak, in hopes of capturing a meteoroid, which is a tiny meteor about the size of a grain of sand. Although the chances are very slim, scientists are hoping their instruments captured one of these speedy particles.

"It works like flypaper," explains NASA astrophysicist Dr. John Horack. "When tiny particles in the stratosphere strike the exposed acrylics, they stick. Then they return to Earth along with the rest of the payload. We've been testing a variety of substances for microparticle capture and the ones we're using on this flight look promising."

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