All facts — Page 73
The complete ONAURE library, newest first. Every fact has an explanation and a source you can check.
2056 facts
A rhinoceros's horn is made of the same protein as human hair and nails.
Made entirely of keratin, the horn has no bone in it. Tragically, this false belief in its medicinal value drives…
The Corpse Flower smells like rotting flesh to attract pollinators.
Amorphophallus titanum emits a horrific stench of decaying meat to lure carrion beetles and flesh flies, which help…
Sliced bread was invented in the United States.
Pre-sliced and packaged sliced bread was invented in 1928 by Otto Frederick Rohwedder, an American engineer. The…
Lemons have more sugar than strawberries.
Despite the sour taste, lemons contain about 2.5% sugar, while strawberries contain only about 0.6%. The sour taste…
Rice is the most consumed food in the world.
Rice is the staple food for more than half the world's population. About 90% of the world's rice production is grown…
Tomatoes were considered poisonous in Europe.
In the 16th and 17th centuries, Europeans believed tomatoes were poisonous because they belong to the nightshade…
Chestnuts are true nuts, but walnuts are not.
Botanically, chestnuts are classified as true nuts, as they are fruits with a hard shell that does not open to…
The first portable computer weighed 11 kg.
The Osborne 1, released in 1981, is considered the first truly commercial portable computer. It weighed about 11 kg…
The first CD was produced in 1982.
The first commercial CD was released on August 17, 1982 in Japan and contained the recording of 'The Visitors' by…
Mongolia has the lowest population density in the world.
Mongolia has about 2 inhabitants per km², making it the sovereign country with the lowest population density in the…
The city of Saint Petersburg was built on 42 islands.
Saint Petersburg, Russia, is composed of 42 islands connected by more than 300 bridges. The city is crossed by canals…
Egypt has only one railway station with high-speed trains.
Egypt's high-speed train station is located in Alexandria. The country has plans to expand the network, but currently…
Iceland has no mosquitoes.
Iceland is one of the few countries in the world where mosquitoes do not exist. The cold climate and sudden…
Greenland is home to the world's largest national park.
Northeast Greenland National Park was established in 1974 and covers about 972,000 km², an area larger than 163 of…
The first person to survive going over Niagara Falls in a barrel was a 63-year-old woman.
In 1901, Annie Edson Taylor, a schoolteacher looking for financial security, famously took the plunge and survived…
The human heart creates enough pressure to squirt blood up to 30 feet.
When the left ventricle contracts, it pumps blood out to the entire body with enough force that, if unobstructed, it…
The human body contains enough fat to make 7 bars of soap.
In addition to fat, the human body also contains enough iron to make a 3-inch nail. This fact highlights the raw…
The average person will walk the equivalent of 3 times around the world in their lifetime.
Based on an average daily step count, humans will take over 100,000 steps every year, accumulating about 115,000…
If you shuffle a deck of cards properly, the exact order has likely never existed before.
There are 52! (52 factorial) ways to arrange a deck, which is a number so astronomically large (8 followed by 67…
In the 19th century, people hosted 'mummy unwrapping parties' as a form of entertainment.
Wealthy Victorians would buy Egyptian mummies and unwrap them in front of guests for amusement, unknowingly…
Sound travels about 4 times faster in water than in air.
Water molecules are packed closer together than air molecules, allowing the vibrations of sound to transfer between…
Water expands by about 9% when it freezes, which is why ice floats.
As water freezes, its molecules form a crystalline structure that pushes them further apart, making ice less dense…
The Earth's rotation is gradually slowing down, making days longer over time.
Caused mainly by the gravitational pull of the Moon (tidal friction), the length of a day increases by about 1.8…
The Great Pyramid of Giza was originally covered in highly polished white limestone.
These casing stones reflected the sun's light, making the pyramid shine like a brilliant jewel from miles away. Most…