Contains an essay on the "domestic tensions which may have affected diplomatic decision making in 1914."

A brief video that describes the unintended consequence of Eli Whitney's cotton gin. [5:14] Followed by a quiz and a list of additional resources to explore.

Eight seismograms and instructions are provided to assist in the learning of how to locate the epicenter of an earthquake.

A brief explanation of Louis de Broglie's original problem with the wave nature of the electron. With links to his original paper on the subject and an animated graphic of the wave.

Understanding that perceptions of the Greek world changed over time is important to reading Greek literature. The perceptions of Homer, Hecateus, Eratosthenes, and Ptolemy are presented as map frames at this site. Consider how Homer's...

A brief explanation of Louis de Broglie's original problem with the wave nature of the electron. With links to his original paper on the subject and an animated graphic of the wave.

A home of influential congressman and senator Carter Glass.