This page from the GeoTech Center provides a link to an introductory textbook on Geographic Information Systems, or GIS. The textbook is freely available online. The text covers a general introduction to GIS, vector...

This site provides a technical report summarizing hundreds of research papers on this global issue. Offers definitions and presents bycatch by gear type, target species and fishing area. Includes overviews of biological...

Scientists clean up chemicals like polychlorinated biphenyls (PCBs) with help from vegetables like pumpkins and zucchini. This radio broadcast explains how certain vegetables can be grown to absorb pesticides and...

In this activity, students construct a magnetometer from a magnet and a spring balance and use it to locate buried objects in a tray. The activity will reinforce the idea that local fluctuations in Earth's magnetic field...

In this activity, students will refer to a graph of hydraulic measures of water for the state of Maine to gather and interpret statistics on precipitation, stream flow, depth to groundwater, and others; and examine an...