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Uranium is best known for the destructive power of the atom bombs, which ushered in the nuclear era at the end of World War II, but given the effectiveness of nuclear power, nuclear power plants were constructed around the developed world during the second half of the 20th century. While nuclear power plants were previously not an option and thus opened the door to new, more efficient, and more affordable forms of energy for domestic consumption, the use of nuclear energy understandably unnerved people living during the Cold War and amidst ongoing nuclear detonations.

It takes a special type of person to serve in a nation’s navy, especially on long voyages that separate men and women from their loved ones, and no service is both loved and hated as that aboard submarines, for very few people ever serve on them on a whim. For one thing, the psychological impact of being trapped for long periods underwater in tight, cramped quarters is more than many people can stand.

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.

Nikola Tesla was one of history’s greatest scientists, and though he is best known for his pioneering work with electricity, the fact that he is mostly remembered solely for that actually does a disservice to his legacy.

People have always been fascinated with the hidden, the mysterious, and the unexplained. Every society has tall tales, ghost stories, odd legends, and heroes. Every society also has its stories of strange beasts, dangerous or benign, that live in the twilight world between the everyday and the legendary. Through most of history, people have been closely tied to nature, hunting in forests and having an intimate knowledge of the animals in their regions.

Naturally, this increasing belief in demonic possession has also led to an increase in the numbers of exorcisms that priests and others are called to perform. Again, precise figures are not available, but one high-profile exorcist in America, Father Vincent Lampert, the exorcist for the Archdiocese of Indianapolis, told a reporter in October 2018 that he had received over 1,700 requests for exorcisms so far that year, the highest number he had ever experienced.

Conspiracy theories, and particularly the belief that elements of the world are secretly controlled by individuals or groups, have been around for as long as people have lived in groups. Perhaps that’s inevitable—after all, those who are excluded from power are very likely to be inclined to see their position not as an outcome of their own choices or situation but because of the secret machinations of shadowy groups. One of the most widely discussed conspiracy theories concerns what has become known as the New World Order.

In the early years of Christianity, it was forbidden to move and share the remains of saints and martyrs, and they were protected so that their final resting places, such as catacombs and cemeteries, remained intact. The earliest recorded Christian relics, specifically the bones and ashes of martyrs, date from the second century. Two hundred years later, St. Ambrose and others set out to dig up the corpses and honor them. At that time, it was considered that every holy body could be dismembered and divided among the faithful to worship it.

The Pleistocene spans a period from around 2.5 million years ago to just over 12,000 years ago, and it was an epoch of enormous change on Earth, mainly characterized by climate changes involving fluctuations between periods of extreme heat and long periods of glaciation. This period is commonly known as the Ice Age, despite the fact there were actually a number of separate periods of cold.

Although it was an incredibly important period in world history, the era after Alexander the Great's death is sometimes as confusing as it is frustrating for historians because the allegiances of his generals changed constantly and historical sources are often biased in some regards and utterly lacking in others. Although none of these men were able to replicate Alexander the Great’s territorial success, a few carved out sizable empires and were able to establish long-lasting political dynasties.

The outcome of the English Civil War was no doubt unthinkable to many across Europe before it actually happened, and the Battle of Edgehill represented the first sign that things might not go according to the typical plan. That year, the unthinkable happened when the king and Parliament broke with each other, raising their standards of war. The divinely appointed order was broken, and the result was bloodshed, terror, and chaos. Most notably, Edgehill would make clear that things might not simply go the king’s way.

In the 21st century, most people associate the idea of the possession of a person or place by a malevolent supernatural entity with the medieval world, and particularly with the Catholic Church, but the truth is considerably stranger. Virtually every human culture that has ever existed has talked about both possession and exorcism, a rite or ritual used to free a person or place from possession.

While modern technology has helped astronomers view the furthest reaches of the Solar System, it has also allowed scientists to start discovering planets orbiting distant stars. To make it easier to assess the relative mass and size of the new planets being discovered, scientists give these measurements as multiples of those properties for either Jupiter or Earth

The borderlands of the paranormal include some bizarre stories. However, none are more strange or unsettling than the tale of what became known as the Philadelphia Experiment, an alleged effort during World War II to make a US Navy ship invisible by using electrical power.

When one thinks of the world’s first cities, Sumer, Memphis, and Babylon are some of the first to come to mind, or if the focus then shifts to India, then Harappa and Mohenjo-daro will likely come up. But archaeologists recently uncovered a site thousands of years older than any of those, marking one of the oldest settled sites in the world.

The Vietnam War could have been called a comedy of errors if the consequences weren’t so deadly and tragic. In 1951, while war was raging in Korea, the United States began signing defense pacts with nations in the Pacific, intending to create alliances that would contain the spread of Communism. As the Korean War was winding down, America joined the Southeast Asia Treaty Organization, pledging to defend several nations in the region from Communist aggression. One of those nations was South Vietnam.

Much has been written about Western intervention during the breakup of Yugoslavia, and whether it made matters worse, prevented worse atrocities, or was simply ineffective. In early 1992, however, what was clear was that Europe was hopelessly divided over the best course of action to take towards Yugoslavia, and after several years of fighting, the Bosnian War was one of the most violent conflagrations in Europe since the end of World War II.

The Vietnam War could have been called a comedy of errors if the consequences weren’t so deadly and tragic. In 1951, while war was raging in Korea, the United States began signing defense pacts with nations in the Pacific, intending to create alliances that would contain the spread of Communism. As the Korean War was winding down, America joined the Southeast Asia Treaty Organization, pledging to defend several nations in the region from Communist aggression. One of those nations was South Vietnam.

Thinking of Spain as a modern nation state today distorts the complicated reality that the Iberian Peninsula faced in the past. Spain was a nation in progress, consisting of regions united under the Spanish crown, but with strong regional identities based on different historical and cultural experiences. The largest entities were the kingdoms of León and Castile, but Spain also included the kingdoms of Navarre, Andalusia, Granada, Jaén, Aragon, and Valencia.

Today the Space Race is widely viewed poignantly and fondly as a race to the Moon that culminated with Apollo 11 “winning” the Race for the United States. In fact, it encompassed a much broader range of competition between the Soviet Union and the United States that affected everything from military technology to successfully launching satellites that could land on Mars or orbit other planets in the Solar System.