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On the morning of January 28, 1986, the Space Shuttle Challenger launched for the 10th time, beginning mission STS-51-L. Space shuttles had already successfully completed 24 missions, and no American spacecraft had ever failed to reach orbit during an official mission.

The political and military nature of the Revolutionary War was just as full of intrigue. While disorganized militias fought the Battles of Lexington & Concord, George Washington would lead the Continental Army in the field while men like Thomas Jefferson drafted the Declaration of Independence in Philadelphia and Benjamin Franklin negotiated overseas in France.

During the reign of the Artaxiad dynasty, Armenia became a hub of trade and commerce, connecting the Silk Road and the Mediterranean world. The Armenian kings encouraged the development of agriculture, commerce, and arts, and the kingdom became renowned for its skilled artisans, writers, and philosophers. Of course, given its central location, the dynasty also faced numerous challenges, including repeated invasions by the Roman and Parthian empires, internal conflicts, and economic hardships.

One of the most idiosyncratic horrors of Soviet Russia was the Gulag system, an extensive network of forced labor and concentration camps. Part of the rationale behind this system was that it could serve as slave labor in the drive for industrialization, while also serving as a form of punishment. The name Gulag is in fact an acronym, approximating to “Main Administration of Camps” (in Russian: Glavnoe Upravlenie Lagerei) and operated by the Soviet Union’s Ministry of the Interior.

It would be hard if not outright impossible to overstate the impact Roman Emperor Constantine I had on the history of Christianity, Ancient Rome, and Europe as a whole. Best known as Constantine the Great, the kind of moniker only earned by rulers who have distinguished themselves in battle and conquest, Constantine remains an influential and controversial figure to this day.

We take time for granted as it passes during every moment of our existence. Other things may change, but time remains constant and predictable. The past, the present, and the future exist within a harmonious, reliable, and never-changing system. Or at least that’s how it seems… It was Albert Einstein who, in 1905, first theorized that time might not be quite as straightforward as that.

The Neolithic period came before the Bronze Age and is generally regarded as the final subdivision of the Stone Age. During this time, communities domesticated plants and certain animals but still relied on hunting and gathering to a considerable extent, and beginning sometime around 7000 BCE, handmade pottery was developed, along with more advanced stone axes that enabled people to clear vast forests.

The crucial importance of education in China, a prized virtue instilled in the population among all classes by beloved teacher and philosopher Confucius in the 6th century BCE, generated an unprecedented and long-lived golden age of literature and art. It also gave rise to a cornucopia of transformative innovations and groundbreaking technology, particularly following the dawn of the Common Era.

The KGB is one of the most famous abbreviations of the 20th century, and it has become synonymous with the shadowy and often violent actions of the Soviet Union’s secret police and internal security agencies. In fact, it is often used to refer to the Soviet state security agencies throughout its history, from the inception of the inception of the Cheka (Extraordinary Commission) in 1917 to the official elimination of the KGB in 1992.

In 1968, biologist John Calhoun began an experiment at the National Institute of Mental Health in Maryland. Calhoun was interested in discovering the factors that drove and limited rodent population growth; he had joined the Rodent Ecology Project in Baltimore in 1946, and he and other members of the project had become interested in understanding how to reduce rodent pests in America’s cities without the use of poison.

Before any type of unified political entity named Israel existed, the Jewish groups whose descendants would later form Israel identified themselves by their particular tribe. If asked their nationality or country of origin, they would likely identify themselves as Danites (from the tribe of Dan; Ex. 31:6) or Ephraimites (from the tribe of Ephraim; Judg. 12:5), etc.

What happens when you put good people in a bad place? That was the question that an experiment in 1971 set out to answer when Stanford University professor and psychologist Philip Zimbardo used funding provided by the U.S. Office of Naval Research to create a make-believe prison in the basement of a university building. Male students were offered the chance to take part in the two-week experiment (and to make $15 per day). All applicants were carefully screened to ensure that they were healthy, emotionally and psychologically stable. 24 men were selected out of 75 that had applied.

War has always led to prisoners. In ancient times, many were turned into slaves by the victorious armies, while in medieval Europe, they were often returned to their families in return for a ransom, leading to fortune or poverty depending upon which side one was on. By the Napoleonic era, as armies grew in size and professionalism, many were kept in camps for the duration of the fighting, their captors not wanting to restore their enemies' manpower while the fate of nations hung in the balance.

Early in 1799, Napoleon advanced against France’s erstwhile enemy, the Ottoman Empire, invading modern Syria (then the province of Damascus) and conquering the cities of Gaza, Jaffa, Arish and Haifa. However, with the plague running rampant through his army and his lines of supply from Egypt stretched dangerously thin, Napoleon was unable to destroy the fortified city of Acre and was forced to retreat. The retreat cost him almost all of his wounded as, harassed by enemy forces, he was forced to abandon most of his casualties to the Ottomans’ mercy, or lack thereof.

During the first half of the 1st millennium CE, an empire arose in Persia that extended its power and influence to Mesopotamia in the east, Arabia in the south, the Caucasus Mountains in the north, and as far east as India. This empire, known alternatively as the Sasanian Empire or Sassanid Empire, was the last of three great dynasties in Persia - the Achaemenid and the Parthian being the first two dynasties - before the rise of Islam.

In the first half of the 20th century, war was fought on a global and industrial scale. Millions of men were flung into the grinder of World War I and World War II, leading to commensurately huge numbers of prisoners of war (POWs). Camps were built to hold thousands of captives, with their own barracks blocks, parade grounds, and even farms. All of this meant that prisoners were taken across the world, and prisoners of war were typically comprised of two classes: officers and other ranks.

In many ways, the story of Camp Douglas outside of Chicago is the story of the Civil War itself. The camp got its start as a brand new facility filled with men ready to fight a war that most on both sides believed would last only a few months. However, as the war went on, the facilities were overwhelmed by the sheer scale of the damage and the massive numbers of people involved.

The ancient world was full of many fantastic cities and places, and like today’s major cities, the great ancient cities were hubs of trade, religion, and science. Writing was first invented in ancient cities, and many important scientific discoveries were also made in them, some of which are still used in the modern world. Among the many cities of the ancient world, Rome and Athens may come to mind first, but the city of Babylon in the land of Mesopotamia was already an ancient, venerated city when the others were still inconsequential settlements.

The current view of science is that Earth is around 4.6 billion years old. The first four billion years of its development are known as the Precambrian period. For the first billion years or so, there was no life on Earth, and then the first single-celled life-forms, early bacteria and algae, began to emerge. It’s unknown where they came from or even if they originated on this planet at all, but this gradual development continued until suddenly (in relative geological terms), more complex forms of life began to emerge.

Many ancient civilizations have influenced and inspired people in the 21st century. The Greeks and Romans continue to fascinate the West today. But of all the world’s civilizations, none have intrigued people more than the Mayans, whose culture, astronomy, language, and mysterious disappearance all continue to captivate people. In 2012 especially, there has been a renewed focus on the Mayans, whose calendar has led many to speculate the world will end on the same date the Mayan calendar ends. The focus on the “doomsday” scenario, however, has overshadowed the Mayans’ true contribution.