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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.
Pottery incense burner from a shrine at Mayapan depicting the rain god Chac. The Maya god carries a small bowl in one hand and a ball of flaming incense in the other. Ht 54.6 cm (21.5 in).
Click on image for full size
the Peabody Museum, Harvard University, Cambridge, MA.

Xib Chac

Xib Chac was the rain god according to the Mayan pantheon. The rain god was a benevolent deity, and was depicted with different colors. Numerous sacrifices were offered to the rain god. During the religious ceremonies, the priest was assisted by four old men, called Chacs in honor of Xib Chac.

The four assistants would hold the arms and legs of the victim, while the chest was slashed by another individual who bore the title of Nacom. Human sacrifices were performed on prisoners, slaves, and unfortunately, on children.

An important part of the ceremony was related to the prophecies disclosed by another religious functionary, named Chilam. This individual, a sort of visionary shaman, would reveal, while in a state of trance, the messages sent by the gods to be interpreted by the priests.

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