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Theories of the Universe: The Particle Zoo

The Particle ZooTheories of the UniverseForces, Particles, and Some Cosmological GlueSize in the MicrocosmThe Forces You Already KnowThe Particle ZooThe Last Train to Quarkville One of the most…

cryptography

(Encyclopedia) cryptographycryptographykrĭptŏgˈrəfē [key] [Gr.,=hidden writing], science of secret writing. There are many devices by which a message can be concealed from the casual reader, e.g.,…

Interview: Edward Ball on Slaves in the Family

"It Cuts Both Ways" I'm sure that you've heard about the proof that Thomas Jefferson fathered children by his slave, Sally Hemings... Bebe Moore Campbell, the novelist, said in a commentary…

Lighthouses: FAQ

Source: The United States Coast Guard Our first lighthouses were actually given to us by Nature. Sailors sometimes used landmarks such as glowing volcanoes to guide them. In the Ancient World,…

Nadelman, Elie

(Encyclopedia) Nadelman, ElieNadelman, Elieāˈlē nädˈəlmən [key], 1882–1946, Polish-American sculptor, b. Warsaw. He spent some time in Paris and is said to have influenced Picasso. Before he settled…

American Medical Association

(Encyclopedia) American Medical Association (AMA), professional physicians' organization (founded 1847). Its goals are to protect the interests of American physicians, advance public health, and…

The Leaning Tower of Pisa

The Question: Why is the Leaning Tower of Pisa leaning and not falling over? The Answer: Mainly because of efforts that have been taken to save…