Other
United States Early Radio History: The Versatile Audion
A reprint of an article from the magazine, "Electrical Experimenter," from February 1920, by H. Winfield Secor, describes some of the many practical uses to which the audion has been adapted.
Famous Scientists
Famous Scientists: Lee De Forest
Learn about the life and discoveries of Lee De Forest in this article.
BBC
Bbc: Deadly Clashes in Peru's Amazon
This short article and video describe the clashes occurring in the Amazon between Peruvian security forces and indigenous Amazon tribes. (June 5, 2009)
American Institute of Biological Sciences
Action Bioscience: Issues in Environment
This site from American Institute of Biological Sciences provides a collection of articles on current issues in environmental science and human impacts on the environment. Several articles available in Spanish.
PBS
Pbs Nova: Eastern Island Moai (Stone Sculptures)
Easter Island's famous carvings, called moai, bear silent witness to the collapse of the Polynesian culture that once thrived there. View these massive artworks and read about the deforestation of the island. An excellent site for...
BBC
Bbc: Peru Polarized After Deadly Clashes
BBC correspondent Dan Collyns examines the polarizing effects of the clashes in the Amazon between indigenous tribes and Peruvian security forces on the people of Peru. Links to related articles are provided. (June 10, 2009)
Globio
Glossopedia: Tropical Rainforests
Tropical rainforests are found along the Earth's equator. They possess a very special climate and are an integral part of the planet's natural system. Climate, plant and animal life, and indigenous peoples are discussed. Additionally,...
Globio
Glossopedia: Plants
Plants are one of the two major Kingdoms of living creatures on the Earth. They are the only beings which produce their own food. Additionally, plants are necessary for animals to live. Plant anatomy, life cycle, reproduction and the...
Read Works
Read Works: Can the Amazon Be Saved?
[Free Registration/Login Required] Students read about the disappearing Amazon rain forest. A question sheet is available to help students build skills in cause and effect.
Read Works
Read Works: Paradise Lost
[Free Registration/Login Required] Students read about how the Amazon rain forest and some of the animals living there. A question sheet is available to help students build skills in drawing conclusions.
Read Works
Read Works: Rain Forest Rescue
[Free Registration/Login Required] Students read about how the Amazon rain forest and how Brazil is trying to protect it. A question sheet is available to help students build skills in drawing conclusions.