Explains how composting toilets work, their benefits to the environment, useful applications, and information on how to choose a system.

This study guide is designed to help students begin thinking about groundwater - where it comes from, why it's important, and how it can be conserved and protected. The guide includes a brief overview of groundwater, a glossary, and...

This site provides a wide range of unique and interesting articles and online books which focus on various aspects of Texas' history. Content ranges from the first people of Texas to the presidency of Anson Jones to a look at one of the...

A fantastic history of NATO. From its inception after WWII to its call to action during the Kosovo crisis, the BBC does a great job of giving readers a well-rounded look at the institution. Includes a map with all member countries as...

In 1991, communist hardliners attempted to overthrow Mikhail Gorbachev for his reforms leading to the break-up of the Soviet Union. The coup lasted for three days. Article dated August 15, 2001.

The BBC provides photograhs and narrative describing the fall of Saigon, Vietnam on 30 April 1975, when the last Marines were evacuated from the U.S. embassy roof and the incoming North Vietnamese Army smashed through the gates of the...

The BBC provides a detailed 5 page overview of the Korean War that took place in the mid-1950s.

Basic design of a demonstration machine that will lower the vapor pressure and cause water to evaporate at room temperature.

This military history essay describes the landing of the United States Army during the Normandy Invasion of June 6, 1944.

Get a diver's perspective of the Academy's Philippine Coral Reef tank, the world's deepest living coral reef display. At 25 feet deep, the tank holds 212,000 gallons of water and houses over 2,000 colorful reef fishes.

By choosing the mass, size, and time, students can experiment with whether the block floats or sinks in this simulation. Students have the option to display the forces and add a second block to the tank. Density is also shown to allow...

Learn where wastewater goes and where drinking water comes from. Students can then make a model sedimentation tank to observe how sludge and effluent are separated.

A secular news and photo service that provides limited access to its 24-hour coverage of religious issues of the day. You can view abstracts of news stories that the service is following; click over to a calendar of events that lists the...

A slideshow of captioned photographs of the giant octopus, with links to a video of feeding time in the giant octopus tank and to other animals from the deep reef--the sheep crab, wolf-eel, and lingcod.

This is a site from NASA that provides an activity where "You have invented a new material to use for the fuel tanks on the spacecraft. But before you send your new material into the harsh environment of space, you must test it on Earth...

A behind the scenes peek at the Dwarf Cuttlefish (Sepia bandensis) a native to the Indo-Pacific region of the ocean around Indonesia, Papua New Guinea and the Philippines. Watch as crabs get dropped into the tank, and the cuttlefish move...

A think tank research group that is "Pro-immigrant, low-immigration." Center for Immigration Studies offers current news articles and common topics in immigration.

Read about the funny story of a cat who travelled quite a way after falling asleep on the fuel tank of a bus.

The tank-like Nine-banded Armadillo's range has greatly expanded northward in the last 100 years. In the mid-1800s it was found only as far north as southern Texas; by the 1970s it lived in Oklahoma, Kansas, Missouri, and Tennessee; now...

Kids learn about the changes in modern warfare that occurred during World War I including airplanes, bombers, tanks, trench warfare, submarines, machine guns, and chemical weapons.

This lamp has a round base, the oil tank is pear-shaped; the opening for the wick has a slight inward turned rim. The bulbous lid is topped by a knob and is held to the oil tank by a hinge.

Steel tank from a wind tunnel at Langley Research Center. (use source ).

"The First World War saw the introduction of many new technologies to the art of killing one's enemy: the machine gun, the tank, the airplane, the zeppelin, and gas to name a few. Among these, gas was probably the crudest, certainly the...

"The First World War saw the introduction of many new technologies to the art of killing one's enemy: the machine gun, the tank, the airplane, the zeppelin, and gas to name a few. Among these, gas was probably the crudest, certainly the...