![Worldwide earthquakes with M4.0+ located by USGS and Contributing Agencies. (Earthquakes with M2.5+ within the United States and adjacent areas.)](https://webarchive.library.unt.edu/web/20130216035716im_/http://www.free.ed.gov/images/resources/earthquake.jpg)
![](https://webarchive.library.unt.edu/web/20130216035716im_/http://www.free.ed.gov/images/transp.gif)
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![](https://webarchive.library.unt.edu/web/20130216035716im_/http://www.free.ed.gov/images/resources/sci360.jpg)
![](https://webarchive.library.unt.edu/web/20130216035716im_/http://www.free.ed.gov/images/transp.gif)
![](https://webarchive.library.unt.edu/web/20130216035716im_/http://www.free.ed.gov/images/arro4.gif) |
Science360 for iPad provides easy access to engaging science and engineering images and video from around the...
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![](https://webarchive.library.unt.edu/web/20130216035716im_/http://www.free.ed.gov/images/transp.gif) |
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![](https://webarchive.library.unt.edu/web/20130216035716im_/http://www.free.ed.gov/images/transp.gif) |
![The golden toad, last seen in Costa Rica's cloud forest in 1989, is believed to be extinct. The ecology of the cloud forest depends on the frequent formation of clouds and mist.](https://webarchive.library.unt.edu/web/20130216035716im_/http://www.free.ed.gov/images/resources/exploratorium-earth.jpg)
![](https://webarchive.library.unt.edu/web/20130216035716im_/http://www.free.ed.gov/images/transp.gif)
![](https://webarchive.library.unt.edu/web/20130216035716im_/http://www.free.ed.gov/images/arro4.gif) |
Earth and Space Science provides activities, animations, and lessons on the structure, processes, and history of...
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![](https://webarchive.library.unt.edu/web/20130216035716im_/http://www.free.ed.gov/images/transp.gif) |
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![](https://webarchive.library.unt.edu/web/20130216035716im_/http://www.free.ed.gov/images/transp.gif) |
![Wegener’s proposed Pangaea.](https://webarchive.library.unt.edu/web/20130216035716im_/http://www.free.ed.gov/images/resources/teaching-boxes.jpg)
![](https://webarchive.library.unt.edu/web/20130216035716im_/http://www.free.ed.gov/images/transp.gif)
![](https://webarchive.library.unt.edu/web/20130216035716im_/http://www.free.ed.gov/images/arro4.gif) |
Teaching Boxes helps teachers create earth science activities that focus on gathering data and analyzing...
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![](https://webarchive.library.unt.edu/web/20130216035716im_/http://www.free.ed.gov/images/transp.gif) |
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