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.
Detail of a memorial stone, dated from about A.D. 500, found during the restoration of a church at Sanda in Gotland. The tree at the center of it symbolizes the Viking concept of the universe.
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Image reproduced by courtesy of Gotlands Fornsal, Visby.

Midgard

In Norse mythology, Midgard is the Earth. It was created when the supreme god, Odin and his two brothers slayed a giant. The roots of the tree reach into the underworld and up into the land of the giants. Midgard is surrounded by the ocean where a giant snake lives.

Asgard, the home of the gods, was joined to the Earth by a bridge called Bifrost, symbolized by a rainbow. Odin, the supreme Norse god, is able to look down over all that he rules.

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Cool It! Game

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Inuit Inuit people live in the chilly northern parts of Canada, Alaska (USA), Siberia (Russia), and Greenland. There are many different groups of people in this large area. Most have similar ways of living...more

Ahsonnutli

Ahsonnutli was the sky father and chief god of the Navajo. He created heaven, Earth, and the sky. The four main directions are believed to be supported by giants. Each direction has a specific color: white-east;...more

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In Roman and Greek mythology, Amphitrite was a beautiful sea nymph. Poseidon (Neptune), who was the god of the sea and earthquakes, fell in love with her at first sight. Amphitrite did not respond to his...more

Aphrodite

Aphrodite was the Greek goddess of love and beauty. She was known to the Romans as Venus. To the perfection of her figure and the purity of her features she added an innocent grace. On her sweet face she...more

Apollo

In Greek mythology, Apollo was the son of Jupiter(in Greek Zeus) and Leto (Letona). He was the god of the Sun, logic, and reason, and was also a fine musician and healer. He was known as the god who could...more

Cancer

According to an ancient Greek legend, the figure of a gigantic crab was placed in the nighttime sky by the goddess Hera to form the constellation Cancer. Hera swore to kill Heracles, the most famous Greek...more

Cepheus

In the Northern Hemisphere sky is the constellation Cepheus, king of Ethiopia. His wife was Cassiopeia. Cassiopeia claimed that she and her daughter Andromeda were more beautiful than the sea nymphs, the...more

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Become a nitrogen atom in the nitrogen cycle in our Traveling Nitrogen Classroom Activity Kit/Game. See all our games, activity kits and classroom activities.

Windows to the Universe, a project of the National Earth Science Teachers Association, is sponsored in part by the National Science Foundation and NASA, our Founding Partners (the American Geophysical Union and American Geosciences Institute) as well as through Institutional, Contributing, and Affiliate Partners, individual memberships and generous donors. Thank you for your support! NASA AGU AGI NSF