It was the second of three stages of the so-called triangular trade, in which arms, textiles, and wine were shipped from Europe to Africa, enslaved people from Africa to the Americas, and sugar and coffee from the Americas to Europe.
Answer:
The Enlightenment, also known as the Age of Reason, was an intellectual and cultural movement in the eighteenth century that emphasized reason over superstition and science over blind faith. Empiricism promotes the idea that knowledge comes from experience and observation of the world.
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The correct answer is Africa
In the early 21st century, Africa was host to many of the world’s refugees. These refugees were displaced from their homes due to conflict and strife that afflicts the continent. Countries such as Sudan, Somalia, Central African Republic are embroiled in conflict to date
It was the fact that world super powers at the time (U.S) and (U.S.S.R) where building up an armory of nukes but they both knew if they where to use these weapons it would utterly destroy the world.
Here's a memory aid: (U.S): hey Russia lets not kill each other with nukes in this war lets just keep it "COOL" and spy on each other instead
Biplanes (and triplanes) became (nearly) extinct not because high strength materials (like composites) were not available, but because they became available.
One of the major reasons for use of biplanes in the early days of aviation was that the materials available were of insufficient strength for the (wing) designs used.
The major disadvantage of biplanes (or triplanes) is aerodynamic- it produces a lot of drag compared to the monoplane and the wings interfere with each other.
So, the biplane was an (aerodynamically) inefficient solution to a structural problem. As higher strength materials like Aluminum became widespread, the biplanes fell out of favor.
While they <em>can</em> be revived, I don't see why someone would do that, except for nostalgia (or some special uses, like aerobatics).
There are some companies who manufacture or restore biplanes, but they usually don't use (modern materials like) composites, though modern avionics are used.