Current Events

  • 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.
Sketch based on a drawing from the Florentine Codex, a sixteenth-century colonial manuscript compiled by Fray Bernardino de Sahagun.
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Huitzilopochtli

Huitzilopochtli, whose name means "Blue Hummingbird on the Left," was the Aztec god of the Sun and the war. He was shown as a blue man fully armed with hummingbird feathers on his head. His mother Coatlicue became pregnant with Huitzilopochtli when a ball of feathers fell from the heaven and touched her. Huitzilopochtli's siblings thought that their mother Coatlicue had dishonored them with her mysterious pregnancy.

One sister of Huitzilopochtli, Coyolxauhqui, encouraged her star sisters and brothers to kill their mother Coatlicue. However, Huitzilopochtli sprang out of his mother and saved her. Coatlicue regretted such violence. Thus, Huitzilopochtli cut off Coyolxauhqui's head and threw it in the sky to become the Moon.

Aztecs used to offer human sacrifices to Huitzilopochtli. The victims were usually prisoners captured in the frequent wars that Aztecs were fighting against their neighbors. The sacrifices were intended to secure rain, harvests and success in war.The most common form of sacrifice practiced by Aztecs was to tear out the heart of a living body and offer it to the Sun.

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