In 1932, Australia declared war. Not on another nation, but on emus. Thousands of the flightless birds were trampling wheat fields in Western Australia, and the government's solution was to send in soldiers armed with machine guns. The birds won.
They scattered into small groups, dodged gunfire with what witnesses called almost tactical precision, and generally made the Australian military look silly in front of the whole country. By the time the operation quietly ended, officials had spent a small fortune on ammunition for what became known as the Great Emu War, a conflict Australia is still a little embarrassed about.
Now picture something stranger. In the summer of 1518, a woman in Strasbourg stepped into the street and started dancing. She didn't stop. Within a week, dozens of her neighbors had joined her, and within a month hundreds of people were dancing through the streets, seemingly against their own will, some until they collapsed from exhaustion.
Physicians at the time actually encouraged more dancing as a cure, hiring musicians to keep the rhythm going. Historians still argue about what caused this so-called dancing plague, with theories ranging from mass stress hysteria to contaminated rye bread, but nobody has a definitive answer even five centuries later.
History also has its share of accidents that sound made up but weren't. In January of 1919, a massive steel tank in Boston's North End burst open and released more than two million gallons of molasses into the streets. The wave reportedly moved at around 35 miles per hour, fast enough to sweep away buildings and part of an elevated train line. There were 21 casualties and over 150 people injured.
Locals swore for decades afterward that you could still catch a whiff of molasses on hot summer days near the harbor. The Great Molasses Flood remains one of the strangest industrial disasters in American history, proof that even something as sweet and harmless sounding as molasses can turn deadly under the wrong conditions.
Then there's the time a pig nearly started an international war. In 1859, tensions between American settlers and British authorities on San Juan Island had been simmering for years over an unclear border. Things boiled over when an American farmer shot a pig that belonged to a British company because it kept digging up his potatoes.
