Maya Angelou was the first black female streetcar conductor in San Francisco.
In Japan, letting a sumo wrestler make your baby cry is considered good luck.
In Great Britain and Japan, black cats are perceived as auspicious. In the English Midlands, new brides are given black cats to bless their marriage, and the Japanese believe that black cats are good luck—particularly for single women.
Portland was named by a coin flip. Had the coin landed the other way, the city would be Boston, Oregon.
Sleep literally cleans your brain. During slumber, more cerebrospinal fluid flushes through the brain to wash away harmful proteins and toxins that build up during the day.
Space has a distinct smell: a bouquet of diesel fumes, gunpowder, and barbecue. The aroma is mostly produced by dying stars.
Dogs are capable of understanding up to 250 words and gestures. The average dog is as intelligent as a two-year-old child.
Goats have rectangular pupils.
Before he became president, Abraham Lincoln was wrestling champion of his county. He fought in nearly 300 matches and lost only one.
A double rainbow occurs when sunlight is reflected twice inside a raindrop. If you look closely, you can see that the colors of the secondary rainbow appear in reverse order.
China owns all of the pandas in the world. They rent them out for about $1 million a year.
The number of bacteria in a person’s mouth is equal to the number of people living on Earth, or even more.
Over the course of just one day, our blood ’runs’ the distance of 19,312 kilometers.
There are not just four different blood types as we used to think, but in fact 29! The rarest of them belongs to the Bombay subtype, which is common for a small group of families in Japan.
The speed of an incoming brain impulse is about 400 km/h.
A human makes approximately 20,000 breaths per day
The heart beats 35 million times a year. Yes, 35 million. A year!
Smiling triggers 17 muscles of the face while crying activates 43. So smile more!
