Examine this graph from FRONTLINE/NOVA: "What's Up with the Weather?" Web site to see dramatic increases in three greenhouse gases over the last two hundred years.

This colorful, interactive site demonstrates how fossils can be used to discover a range of information about the past. Topics include Past Lives, Paleoecology, Geologic History, and Biodiversity.

Offers a collection of links to news items related to prehistoric studies. A good resource for keeping up-to-date on scientists' discoveries about our Earth's past.

The story of the universe is told in this engaging site by the European Space Agency. The history of European space science is timelined with dates ranging from 1066 to present day. The birth of galaxies, the big bang, and the beginnings...

In this activity, use seasons to determine your location. Click on the different dates to view the earth's shadow at different times of the year from the sun's position.

The East Slope of the Acropolis is an area that has not (yet) been the focus of a great deal of archaeological investigation. Early travelers and explorers noted, of course, the very large and prominent East Cave that forms such a...

The property includes nine gardens in as many provinces. They exemplify the diversity of Persian garden designs that evolved and adapted to different climate conditions while retaining principles that have their roots in the times of...

The story of the universe is told in this engaging site by the European Space Agency. The history of European space science is timelined with dates ranging from 1066 to present day. The birth of galaxies, the big bang, and the beginnings...