The Manhattanhenge is an event during which the setting sun or the rising sun is aligned with the east-west streets of the main street grid of Manhattan, New York City. The term was coined by Neil deGrasse Tyson.
In 1990, Czech and Slovak politicians "fought" the Hyphen War, a political battle over whether "Czechoslovakia" should be spelled with a hyphen.
3King Charles VI
King Charles VI of France suffered from glass delusions, a psychiatric phenomenon in which people believe they're made of glass. Charles VI refused to let people touch him and wore reinforced clothing to protect himself from accidental "shattering."
Approximately 7000 years ago, humans used to drill holes in their heads to allow spirits to flow in and out of the body. This practice is called 'Trepanation.'
5Longest personal name
The man with the longest personal name ever used is Hubert Blaine Wolfeschlegelsteinhausenbergerdorff, Sr. That's only the abbreviation for it; in total his surname is made up of 26 other names and contains 666 letters.
Tinnunculite is a naturally occurring material that only forms when Falcons poop directly into burning coal mines as they fly.
7Illegal prime numbers
Illegal prime numbers exist. An illegal prime is a prime number that represents information that is forbidden to possess or distribute. For example: when interpreted in a particular way, a certain prime describes a computer program that bypasses the digital rights management scheme used on DVDs.
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"Cryptophasia" is a phenomenon where twins make up a language which they only speak with each other. Twin languages often consist of onomatopoeia, and new words twins create by simplifying the words used by adults around them. Up to 50% of young twins may develop their own twin language.
9London Beer flood
A beer tsunami devastated a neighborhood in London killing 8 and destroying whole houses. The 1500 cubic meter flood was ruled as an "Act of God" and nobody was held responsible.
There is a rare human condition called Trimethylaminuria, also known as Fish Odor Syndrome, that causes a person's sweat, urine, and breath to smell like rotting fish. It is caused by a defect in the production of a particular enzyme.