unbfacts: Although it’s hard to believe, 73% of Japan is made up of mountains and rugged terrains forcing 93% of the population to live in the cities. This is the reason for the high population density in its cities. Source

unbfacts: The saying that a rainbow contains seven colors: red, orange, yellow, green, blue, indigo and violet” is a myth. These are actually just the colors of the visible spectrum. Rainbows contain upward of one million colors. They’re just invisible to the human eye. Source

unbfacts: Millennial dads are spending three times as much time with their kids as their fathers spent with them. Back in 1982, 43% of fathers admitted they’d never changed a diaper. By 2000, that number had fallen down to about 3%. Source

unbfacts: Joan Murray survived an 80-mph skydiving fall thanks to landing on a mound of fire ants. Their bites are believed to have given her a rush of adrenaline which kept her heart beating. Source

unbfacts: HMOs are a type of sugar molecules found only in human breast milk. They are not digestible by the infant child. Instead, they feed the “good” intestinal bacteria, thereby increasing the health of the infant’s intestinal microbiome. Source

unbfacts: Japanese doctor Tetsu Nakamura devoted his life revitalizing deserts in Afghanistan, making forests and wheat farmland, and contributing to peace. Nakamura was decorated with the Japanese Order of the Rising Sun and Afghan National Medal. His Afghan community nicknamed him “Uncle Nakamura.” Source

unbfacts: The Baader–Meinhof Phenomenon, also called “frequency illusion,” is an illusion in which the thing you’ve just noticed, experienced, or been told about suddenly crops up everywhere. Source