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Alaska, the American Child is a documentary by John Denver. The filmed was funded heavily by John Denver but received some assistance from ABC . [ 82 ] The film was designed to gather support in Congress for H-39, which would have classified 95 million acres of federal-owned land in Alaska as parks and wildlife refuges.
Bow saw, turning saw, or buck saw: a saw with a narrow blade held in tension in a frame; the blade can usually be rotated and may be toothed on both edges; it may be a rip or a crosscut, and was the preferred form of hand saw for continental European woodworkers until superseded by machines;
The Slinky was invented in 1943 by American engineer Richard T. James while working in his home laboratory to invent a set of springs that could be used to support sensitive instruments on board ships and stabilize them even in rough seas. When he once accidentally knocked one of his springs off a shelf, James saw that, rather than flopping in ...
American researchers made fundamental advances in telecommunications and information technology. For example, AT&T 's Bell Laboratories spearheaded the American technological revolution with a series of inventions including the light emitting diode ( LED ), the transistor , the C programming language , and the UNIX computer operating system.
Santiago Ramón y Cajal fathered modern neuroscience and was the first person of Spanish origin to win the Nobel Prize in Physiology or Medicine (1906). This is a list of inventors and discoverers who are of Spanish origin or otherwise reside in continental Spain or one of the country's oversees territories.
The modern-day circular saw was invented around the end of the 18th century as a rip-saw to convert logs into lumber in sawmills and various claims have been made as to who invented it. Before the design was invented, logs were sawn by hand using a pit saw or using powered saws in a sawmill using an up-and-down saw with a reciprocating motion ...
A 17th–century Dutch map of the Americas. The historiography of Spanish America in multiple languages is vast and has a long history. [1] [2] [3] It dates back to the early sixteenth century with multiple competing accounts of the conquest, Spaniards’ eighteenth-century attempts to discover how to reverse the decline of its empire, [4] and people of Spanish descent born in the Americas ...
A reciprocating saw is a type of handheld, small, machine-powered saw, in which the cutting action is achieved through a push-and-pull ("reciprocating") or back-and-forth motion of the blade. The original trade name, Sawzall , is often used in the United States , where Milwaukee Electric Tool first produced a tool of this type in 1951.