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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.
This is an artist's rendition of the Genesis spacecraft.
Click on image for full size
Courtesy of NASA

In the Beginning...
News story originally written on July 18, 2001

On July 30, 2001, NASA is set to launch the next of its robotic space missions: The Genesis mission. After launching on a Delta II rocket from Cape Canaveral, the Genesis spacecraft will travel toward the Sun and assume an orbit around L1, a position in space where the gravitational pulls from the Earth and Sun are balanced.

Once in position, the Genesis craft will open collector arrays and begin to capture particles that make up the solar wind. These particles are tiny, charged bits of matter than have been expelled by the Sun. In April, 2004, after almost three years of collecting material, the spacecraft will return to Earth. The collected solar material will be recovered in a dramatic, mid-air helicopter capture, so that the impact of landing does not damage the samples. The Genesis mission will be the first mission to collect and return material from beyond the orbit of the Moon.

Studying these particles should help answer fundamental questions about the exact composition of the Sun and about the birth of our solar system. The mission should provide enough material to last for decades of research, which means that further studies of the Sun and its composition will also be possible.


Last modified July 18, 2001 by Jennifer Bergman.

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