This Wikipedia encyclopedia article on Lee de Forest discusses his life and his invention of the triode (or audion), which laid the foundation for radio.

This short article and video describe the clashes occurring in the Amazon between Peruvian security forces and indigenous Amazon tribes. (June 5, 2009)

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)

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,...

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...