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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 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.
These wonderfully balanced rocks mark a tomb in Wales.
Click on image for full size
Photo courtesy Diego Meozzi/Stone Pages

Pentre Ifan Dolmen Tomb

Ancient people all over the world built stone structures. Some of the stone structures marked graveyards for these people. In Wales, there are some stones named Pentre Ifan that mark a grave.

There is one big rock that balances on other rocks. Can you imagine building a play fort out of rocks this big? The big rock is held eight feet off the ground, so there would be plenty of room for you to walk through Pentre Ifan!

Pentre Ifan is really old. It is from around 3,500 B.C. That's older than Stonehenge!

There is a story about Pentre Ifan that say that fairies come and visit it. They wear red caps. Can you make up a story to tell your parents about Pentre Ifan?

Last modified September 19, 2000 by Jennifer Bergman.

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