Current Events

  • Atmospheric CO2 Level Tops 400 ppm
    During the week of May 13th, the CO2 level at the Mauna Loa Observatory in Hawaii topped 400 ppm rep...Read more

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    Atmospheric CO2 Level Tops 400 ppm

    During the week of May 13th, the CO2 level at the Mauna Loa Observatory in Hawaii topped 400 ppm repeatedly. Daily levels of CO2 can vary due to weather, and there are seasonal trends as well. The level of atmospheric greenhouse gases continues to increase, now over 120 ppm since the Industrial Revolution began. For more on the Keeling Curve, see http://keelingcurve.ucsd.edu/. Find out more about greenhouse gases and warming.
  • Massive Tornado Outbreak on Tornado Alley
    The week of May 19 brings dozens of tornadoes to Tornado Alley in the states of Oklahoma, Kansas, Io...Read more

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    Massive Tornado Outbreak on Tornado Alley

    The week of May 19 brings dozens of tornadoes to Tornado Alley in the states of Oklahoma, Kansas, Iowa, Illinois and Missouri. On May 20th, a massive tornado struck Moore, Oklahoma, devastating communities - destroying over 100 homes and hitting two elementary schools and a hospital - with many casualties and deaths. Our thoughts are with our friends and colleagues suffering from these storms. For more on the May 20th storms, see the NOAA Storm Prediction Center Storm Report.
  • 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.
The drawing above is a representation of the Norse conception of the universe as an enormous tree around which is the Earth. At the root of the tree are the world of the Dead, that of the gods, and that of the giants.

Bifrost

Bifrost, the rainbow, was the bridge leading from the Earth, called Midgard, to Asgard, the home of the gods. Only the gods could cross this bridge, which was guarded by the god Heimdall. This bridge has also been associated with the Milky Way.

It was believed that a great battle between good and evil would end in the destruction of the gods. During the battle, Bifrost shattered due to the weight of the monsters.

In the story, all the gods and everything on Earth perished under the sea. However, Earth rose from the waters and life began again.

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Traveling Nitrogen Classroom Activity Kit

Check out our online store - minerals, fossils, books, activities, jewelry, and household items!...more

Arctic Cultures

There are people of different cultures and backgrounds who live in the Arctic region. Read on to learn more about two of these cultures. Inuit The Inuit are the native cultures that continue to live on...more

Ahsonnutli

Ahsonnutli was the sky father and chief god for the Navajo. He created heaven, Earth, and the sky. Each of the four directions, or cardinal points, are supported by a giant. Each direction is symbolized...more

Amphitrite

Amphitrite was one of the sea-nymphs called the Nereids. One day the sea god Poseidon saw her dancing and fell desperately in love with her. He promptly asked her to marry him but unfortunately she refused....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. Leto travelled all over Greece...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, and that of his wife Cassiopeia. Cassiopeia claimed that she and her daughter Andromeda were more beautiful than the sea nymphs,...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