A major distinction between different types of serial killers - and different types of Angels of Death - is motive. Traditionally, male serial killers are more likely to be motivated by sex and female serial killers more motivated by material comfort. However, that it not always the case... particularly not when it comes to killers like Jane Toppan.

We expect nurses and doctors to provide knowledge, health, and most of all, safety. But medical professionals compose a distinct subset of serial killers, known as Angels of Death.

For hundreds of years, Canada and the United States have been each others closest neighbours, strongest allies, and largest trading partners... except for all the times they were at each others throats. The Revolutionary War, the War of 1812, the Pork and Beans War, and the Pig War -- 50% actual wars, 50% backwoods hijinks. This past is one far more recent than one might think, including two declassified documents from the early 20th century -- Defense Scheme One and War Plan Red.

Lizzie Borden, despite being acquitted of all charges, has remained the primary suspect in her parents double-homicide for over a hundred years. Was she really the killer? And is there any way to know for sure? Absolutely not.

Lizzie Borden took an axe Gave her mother forty wacks When she saw what she had done She gave her father forty-one [Citation Needed]

The quest for the Northwest Passage -- a navigable sea route through the Canadian arctic -- was long and dangerous. Even so, when Sir John Franklin led two ships, the Erebus and Terror, on a last mission to complete mapping of North America's icy archipelago, there was every reason for confidence. The Terror and Erebus were last seen by European whalers off the coast of Greenland in the summer of 1845, after which they simply disappeared into the frozen north.

In 1921, Roscoe Arbuckle was one of the most famous men in the United States and among the wealthiest actors in the nascent Hollywood. That all ended when a lurid murder trial for the death of Virginia Rappe led to him being a persona non grata, his films banned all around the English-speaking world.

Before Leonardo DiCaprio, before Rock Hudson, before Clark Gable, before even Charlie Chaplin, the biggest star in American television was none other than Roscoe Arbuckle. A larger than life character from the age of silent film, Arbuckle was a talented performer, dancer, and singer who made hundreds of popular (and profitable) movies. He was better known, however, for his immense size, which earned him the name "Fatty" Arbuckle. All that came crashing down thanks to a lurid scandal which has obscured his legacy to this day.

There have historically been two kinds of phenomena known as ghost ships -- the first, a mysterious apparition crewed by the souls of the damned, and the second, the sudden and unexplained disappearance of a ship's very real human crew. The Mary Celeste, an entirely normal American shipping vessel began as the latter when her crew vanished on a routine crossing of the Atlantic, but her story slowly morphed into the former over the next century. The true fate of the Mary Celeste's crew is likely far more mundane and far more disturbing.

Built in the waning days of the 19th century, the Eiffel tower was erected as the entrance arch to a world fair and survived two world wars to become a towering beacon of Parisian resilience and French resistance. As a modern icon of romance, every day, dozens upon dozens of couples pose and propose in front of the tower as a symbol of their love. In the early 20th, century, however, the Eiffel tower was seen as something of a tacky, modernist eye-sore -- a dangerous pile of rubbish and rust. To con artist Victor Lustig, however, the tower was much more: the perfect scam.